SIPHONS-SIVA 1399 non tube is movable by clockwork, and the ink reservoir according to Gill and Elkin. This would make the distance such rified. ons. Tubes formed by extensions of the mantle in uncle. Tube which unites the chambers of such See ACHETA. Title of baronets, knights, and formerly of clergymen. j-ud-Daula. See SURAJAH DOWLA. onian Bog. According to Strabo, deep lake on the f Egypt, e. from Pelusium, impregnated with asphalt. s says it was overgrown with reeds. At present its overed with sand. One of the chief routes from Egypt passed along a narrow ridge between sea and lake, was dangerous in case of a n. wind. don. See AXOLOTL. 1. Acoustical apparatus for measuring pitch, devised eck and De Latour, and improved by Helmholtz. The form of the latter consists of a cylindrical brass box, of which is pierced with a ring of small holes bored y; just above this and nearly in contact is a movable disk, pierced with the same number of holes similarly d, except that the obliquity is in the opposite direction. k is capable of revolving upon a vertical axis. Through -om of the box is an opening through which air or steam forced; this air, passing through the oblique holes in , strikes against the sides of those in the disk and he latter to revolve rapidly. As the rotation of one on the other causes the holes to be alternately opened sed, the air escapes in successive puffs, the frequency depends upon the rate of rotation and upon the numoles, and a note is emitted whose pitch is equal to the of the number of revolutions per second into the numoles in the disk. The latter is a constant of the int, and a speed indicator will enable one to determine mer. Thus by bringing the siren into tune with any note, the pitch of that note will be known. 1. See PERENNIBRANCHIATA. ia (CETACEA-HERBIVORA). Mammals, formerly included in the order Cetacea. Order of adeciduate, plae aquatic and herbivorous, with sparse hair on the hind limbs, but body terminating in a horizonal fin. kis distinct, and the mammæ are on the breast. The that light would require 8.6 years to reach us from the star. The mass is 5.8 that of the sun, the light 42 times the sun's. Sirocco. Hot and very dry wind in Arabia and the Sahara, usually raising oppressive clouds of dust; also a hot dry n.w. or w. wind in Natal, S. Africa, descending from the high interior country with clear weather, and stronger than the average wind. By its dryness it differs from the scirocco of Italy. Sisal Hemp. Fiber of several species of AGAVE (q.v.). It is grown in the West Indies, and especially at Sisal, Yucatan; it is used in making cordage, and is considered superior to true hemp. Sisenna, LUCIUS CORNELIUS, ab.120-67 B.C. Roman histreacherously slain by Jael. torian of his own time, praised by Cicero. Fragments survive. Sisera. Canaanitish general, oppressor of the Israelites; Sismondi, JEAN CHARLES LÉONARD DE, 1773-1842. SwissFrench author of Italian ancestry, resident chiefly at Geneva. De la Richesse Commerciale, 1803; Hist. Italian Republics, 16 vols., 1807-18, abridged 1832; Littérature du Midi de l'Europe, 4 vols., 1813, tr. 1823; Economie Politique, 1819; Hist. des Frangais, 31 vols., 1821-44; Sciences sociales, 1836. Sisserskite. Rare mineral alloy of iridium and osmium. Sisterhoods. Female associations for pious and charitable work; first formed in R.C. Ch. by St. Vincent de Paul 1629-33 (see CHARITY, SISTERS OF), in Ch. of England by Dr. Pusey 1845, and in the U. S. by Dr. Muhlenberg 1852. Sisters of Mercy. Organized in Ireland 1827, and in the U. S. 1843. They have over 200 houses, and are engaged in teaching and nursing. Sistine Choir. That which sings at the services and functions in which the Pope takes part. It is a collegiate body, and consists of 32 choral chaplains, and is traced in part to 4th century, and more distinctly to 14th. Since 1870 its regular service of the choir has been dispensed with, though it is heard trina, Dufay, Josquin des Prés, Arcadelt, Morales, Nanini, and at long intervals, as at the anniversary of the Pope's consecration. It has played an important part in the history of PalesAllegri. world to roll uphill a huge stone, which always rolled back. Sisyphus. King of Corinth; condemned in the lower See HETEROMERA. Sitaris. Pop., 1890, 1,188. Sitting Bull, 1837-1890. Sioux chief, leader of various raids and massacres. In 1876 his followers overpowered and Dugong (Halicore dugong). are two sets, a milk dentition being present. They sea-weed and are between Whales and Seals, with to the Ungulates. The Sea-Cow, Manatee, and Due examples. They live near the mouths of large rivers, ot grow to any extraordinary size. Unlike the Whales, Crils are on the snout, on which hair is present as a e. s. Sea-nymphs whose songs charmed and destroyed hers; two, sometimes three. Ulysses escaped by stuffcompanions' ears with wax, and tying himself to the out of hearing. Orpheus outdid them in song, whereey cast themselves into the sea and became rocks. us. Pope 384-398; enforcer of clerical celibacy; active Manichees and Priscillianists Sitting Bull. slew Gen. Custer and his troops, and escaped to Canada. He Situation Rent. Value of the advantage which any in ne, made five nephews cardinals, plotted to murci, and involved Italy in war.-V. FELICE PERETTI, ardinal 1570, Pope 1585; energetic ruler. He hated disliked Spain, and approved the murder of Henry ce. x. Variety of Bézique, played by 2, 3, or 4 persons, y-four cards, from 9 upward, the 10 ranking next to o-handed game six cards are dealt to each, three at thirteenth card being turned up on the table for wo cards are a trick, and following suit is not reof trumps may be exchanged by a player for the card, after taking a trick. A card is taken from y each player after a trick is taken. The cards in count as follows: ace 11, ten 10, king 4, queen 3, ine 0. Marriage of king and queen of the same suit, fter winning a trick, counts 20; marriage in trump s 40. After all the cards have been drawn the playfollow suit, and take the tricks if possible. When 66 d the play stops. The game is 7 points, as follows: -6, the opponent having made 33 or more, counts 1; 6, before opponent makes 33, counts 2; making 66, beIn the three-handed -nent makes anything, counts 3. e dealer takes no cards, but counts the same as the f the hand; if he already has 6, he must win on aneal. -. Poor student at Oxford, Cambridge, and Dublin. See GLUE and GELATINE. erg, ERIK ("VITALIS"), 1794-1828. Swedish poet and en, CAPE, or THE SKAW. Most northerly point of , on which is a stone lighthouse, 148 ft. high; near by all town of pilots and fishermen. zer Rack. Extension of North Sea between Dennd Norway, connecting with Cattegat, which leads to tic. Length ab.140 m.. width ab.70 m. ds. Old Norse poets, of whose works many fragments ting. Traveling over ice on a sort of shoe with a runow of steel; not only a sport, but in some countries a ary accomplishment. Indulged in out of doors at first, e to be popular also in rinks, where the ice was at first Juct of winter weather, and later artificial. Then folroller-skating, where the ice was dispensed with, and, d of a steel blade, boxwood rollers were attached to the to and the surface over which the skater Aine start, has A make it; with a flying start it has been covered in 7 sec. quarter-mile, with flying start, has been skated in 31 sec., and a half, with wind, in 1 m. 5 sec., a mile, with wind, in 2 m. 12 sec. English philologist, Skeat, WALTER WILLIAM, b. 1835. editor of Piers Plowman, Chaucer, and other early texts. Etymological Dictionary, 1882. Skeleton. In general, the hard parts of animals; exoskeleton, an external covering, as with Mollusks and Crustaceans; of Invertebrates is horny matter; the and cartilaginous n Vertebrates phate. to which the verteb Three S Skennotoka. Skepticism, or So tainty of all human kn nature of perception a ing, the two being pre Sketch, MILITARY. which topographical hills, passes, streams, curacy to enable a co for marching or battl made by a reconnoissa the part of the officer istics of coolness and rare quality called cou Skew Arch. One its axis, so that the jo stones are warped ins construction and more Skewback. Joint arch abuts, or large sto Skew-bevel Whe of the two shafts are in which the pitch-sur (see GEAR WHEELS). T on frusta or tangent co when a vertical shaft several floors, both to Somewhere near the m property of working in intersection of the two effort on more teeth tha pitch-surfaces are cylin of the hyperboloids, the Skew Determina are equal in magnitude, Skilling. Old coppe Skimmers. Rhynch siderable white, the tail. summer, when these ma head, sides of head. and gated compressed lower face, to scoop up fish. S Skimpings. In Cor that rises to the top in t or scraped off. SKELLIGS-SKUNK ertebrates is mostly of calcium carbonate, silica, or matter; the skeleton of Vertebrates consists of bony rtilaginous matter, the former largely calcium phosVertebrates have a dorsal axis or vertebral column, ch the vertebra are attached, with the spinal cord; in Reptiles, all Birds and Mammals, a breastbone, to which s are attached; a skull, containing the brain; the shoulnd hip-girdles, to which the limbs are attached. In here are 278 bones at birth, which at the age of 25 are 1 to 224 by the uniting of some by bony matter. They nected by cartilaginous tissues. The various divisions cribed under their several titles. ligs. Three rocky islands on s. w. coast of Ireland, lying ne, ALEXANDER JOHNSTON CHALMERS, M.D., b.1837 in ne, WILLIAM FORBES, D.C.L., 1809-1892. Antiquarian; notoka. See CAMPANULARIÆ. ticism, or SCEPTICISM. Doctrine asserting the uncerf all human knowledge and belief. Its basis is the illusory of perception and the contradictions of the understandtwo being presumably the only sources of conviction. ch, MILITARY. Map of a portion of the country upon copographical features, such as roads, woods, valleys, sses, streams, etc., are delineated with sufficient acco enable a commander of troops to maneuver them ching or battle purposes. Such sketches are usually a reconnoissance under fire and therefore require on - of the officer charged with this duty the charactercoolness and bravery, rapidity of execution, and the lity called coup-d'oeil-militaire. w Arch. One whose faces are not at right angles to so that the joints are spiral lines and the sides of the Skew Arch. re warped instead of plane. It is more difficult of etion and more costly than common arches. back. Joint of the abutment against which the ats, or large stone common to both abutment and arch. -bevel Wheels. Gear wheels in which the axes wo shafts are not parallel and do not intersect, and the pitch-surfaces of the wheels are hyperboloids R WHEELS). The actual wheels are usually designed a or tangent cones to the hyperboloids. They occur vertical shaft in a mill drives horizontal shafts on floors, both to be continuous when the former rises ere near the middle of the building. They have the of working in pairs, one on each side of the projected Cion of the two shafts, if it be desired to distribute the more teeth than convenient on one wheel. When the faces are cylinders tangent to the circle of the gorge perboloids, the gears become HELICAL (q.v.). 7 Determinants. Those whose conjugate elements I in magnitude, but differ in sign. ing. Old copper coin of Denmark. mers. Rhynchops nigra, the Black Skimmer, has conwhite, the tail, tips of secondaries, hind neck; and in when these marine birds come north, also the forees of head, and lower parts. They fly with the elonmpressed lower mandible immersed beneath the surScoop up fish. See RAZOR-BILL. pings. In Cornwall poor 1401 Skin. Integument covering the body, serving as the organ of touch. It is composed of two principal layers, the dermis or true skin, and the epidermis or outer layer. In the skin are to be found ramifications of the nerves for the sense of touch, blood vessels, lymphatics and sweat glands. The action of tannin upon the dermis constitutes the process known as tanning, producing LEATHER (q. v.). derangement of the internal economy. A number of forms are Skin Diseases. Those whose manifestations are located in the skin. They may be purely local or but a symptom of a included in cutaneous affections, the modern classifications recognizing about one hundred varieties. Skin-Moths. Beetles of the family Dermestidæ, which attack skins and are frequently found in museums. destructive, Anthrenus museorum, is only ab. th of an in. long turpentine. The most Museum specimens should be killed with benzene, camphor or Skinner, JOHN, 1721-1807. Minister at Langside, Scotland, 1742-1806; imprisoned 1753; author of Tullochgorum and other songs. Ecclesiastical Hist. Scotland, 1788; Poems, 1809.-His son, JOHN, 1744-1816, became a bishop 1782, primus of Scotland 1788, and was one of Dr. Samuel Seabury's consecrators 1784. American Farmer, 1819-29; Turf Register, 1829-39; Farmer's Skin Sensations. Changes of consciousness aroused by stimulation of the skin. They include tactile sensations and sensations of temperature. See TOUCH and TEMPERATURE SENSE. Skip, or SKEP. Bucket or car in which coal or ore is raised to the surface from the underground workings of a mine. It usually runs between guides, but sometimes on rails. Skittles. See BowLS. quered Khiva and Khokand 1873-74, and gained repeated vic- Skotograph, or SKIOGRAPH. Shadow picture taken on a Skuas (SEA - HENS). Web-footed, marine birds of the Arctic and Antarctic Oceans; like large brown gulls. They have a cere on the bill like a Puffin. They feed on other birds. Skull. With man this is divided into the cranium, forming the braincavity, to which it gives protection, and consisting of 8 bones; and the face, which consists of 14 bones. Many sutures between the bones at birth are closed by bony union in the adult. The capacity of the human skull is from 60 to 110 cu. in., average 85 in. See CRANIOMETRY. а A... Side View of Human Skull: a, frontal bone; b, parietal bone; c, occipital BD, height of cranium; GO, length of cra ily Labiata, principally natives of the n. temperate zone. Very inn SKUNK-BUSH-SLAVERY IN THE U. S. rally from hydrophobia, and that from them s disease originally. h. Ptelea augustifolia. Shrub of the natural - native of s. w. U. S. The foliage has a me bage. Spathyema foetida. Large-leaved herb rent arch of the heavens, which is blue on a is due to the downward reflection of light from small solid particles suspended in the atmosne and violet rays of light are most refracted ected repeatedly by these solid particles; if the coarse, the light reflected is white, as with light, not thus reflected, is transmitted yeler, or is absorbed. See ATMOSPHERE, CLOUDS, nd METEOROLOGY. e of the Hebrides, off w. coast of Scotland; part Area 535 sq. m.; pop., 1891, 15,800, and dwindling. rier. Long silky-haired house-dog, 40 in. long, m color gray to dark blue, it is supposed to have a cross of a Skye dog with a Maltese terrier, otful. r SCYROS. Ancient island of Greece, to the e. of f Euboea; one of the Sporades. Its silver mines quarries are no longer worked. Here Achilles conIt abounds in vineyards If before the Trojan war. imbered. Area 79 sq. m., pop. ab. 3,200. oal. Small or refuse coal broken from the larger ndling during the operations of mining or prepar ret. ELIX, 1789-1868. Founder of chairs of Art in Oxridge, and Univ. London. WILLIAM, 1786-1859. M.C. 1831-43; Gov. of Vt. Laws of e. National Board of Education 1846-56. Reports of Vt. Supreme Court, 1844. ick. Castings made of melted slag, and used for of sidewalks, and even for roadways. They have nto general use. Vitreous product of metals or minerals, after fuast-furnaces. Silica, alumina, chloride of calcium are made from slag, and it is used for roofing, glass, and in thin slabs like Dutch tiles. See ALLAST, SCORIA, and SLAG BRICK. er. Oral defamation. To be actionable it must im-iminal offense involving moral turpitude, or a conisease which would exclude from society, or which prejudice the victim in his trade or calling, or must cial damage. . Words and phrases not recognized by correct usage; es the "jargon of thieves and vagabonds;" often merely 1 and jocose; frequently silly and vulgar, sometimes and imaginative, "poetry in the egg." Its unbridled the unsparing condemnation of it are alike objec Cleavable rock in which the tendency to split is as resulting from long-continued pressure exerted at ngles to the cleavage planes. Slates vary in mineral hemical composition. The most common is known as te or argillite. Roofing slate of excellent quality is in Wales and Canada. In the U. S. the principal slate are in Pa. and Vt. Its tensile strength is ab.3,000 and pressive strength 12,000 lbs. per sq. in. During 1896 the f all the slate produced in the U. S. was $2,728,437, of Pa. produced two-thirds and Vt. one-fourth. er, SAMUEL, 1768-1835. English machinist, founder of st successful cotton-spinning mill in U. S., at Pawtucket, 1790, and later of others in Mass.-His nephew, JOHN 815-1884, gave a fund of $1,000,000 in 1882 for the eduof freedmen. tin, RUDOLPH, b.1856. Austrian officer, in Africa under n 1878: Pasha 1879, and Gov. of w. Darfur 1880-Dec. 1883, he was overcome by the Mahdists: held as a slave till 895. The story of his battles, captivity, and escape is n his Fire and Sword in the Sudan, tr. 1896. ughter House, or ABATTOIR. Establishment for the htering and preparation of cattle, calves, sheep and lambs pod, so arranged that there shall be no contamination of atmosphere by injurious or unpleasant emanations. The is in 1807; in 1818 five public abattoirs din London the U. S. they are usually owned by private persons. The most elaborate are constructed of brick and iron, and are furnished with machinery and appliances for rapid and humane slaughtering, saving the blood and drying it, chill rooms for cooling the slaughtered animal, and cold storage for the dressed beef. The liver, heart, tongue, tail, fat, hide, hoofs and horns are all prepared for sale. In some places oleomargarine is prepared from the fat and the trimmings are canned for soup. The refuse matter is carefully removed without nuisance. One abattoir in New York has a capacity for slaughtering 5,000 cattle per day and cold storage for 6,500. Slave Coast, or BENIN COAST. In W. Africa, extending from the Volta R. to the Benin R.; oppressively hot and unhealthy. The slave-trade, which flourished here in former times, has been suppressed. It is under the German, French and British influence. See LAGOS, SENEGAMBIA, and TOGO. Slave Gang in Zanzibar. ing Christians, until 1812. Negro slavery existed from ancient times. They were brought from Africa to America by the Portuguese and other colonizers, and were first largely used in Hayti ab.1500. The English brought 300,000 slaves from Africa to their colonies 1680-1700, and 610,000 to Jamaica 170086. Up to 1772 negro slaves were also held in England; at that date it was decided by the courts that a slave became free on English soil, but could be reclaimed in his master's country. slaves took place in Hayti 1791; in the British colonies 1838; Slave trade was prohibited by England 1808. Emancipation of in the French colonies and the South American republics 1848; in the Dutch colonies 1863; in Brazil 1888. See SLAVERY IN THE U. S. Slavery in the U. S. Slavery was a recognized fact in the U. S. from colonial times. In 1776 ab. 300,000 slaves had been imported into the colonies since their settlement. By 1790 this number had increased to 700,000; by 1850 it was over 3,000,000, and in 1861 nearly 4,000,000. The founders of the Republic were mostly opposed to the institution and efforts were made to abolish it. But Ga. and S. C. insisted on its preservation as a condition of their entering the Union, and it remained, although the Constitution refused to recognize it by name, Madison saying that the U. S. "did not choose to admit the right of property in man." The slave question entered into nearly every chapter of the subsequent history of the U. S. until the Civil War. The admission of States, the enactment of laws, even the decisions of courts, were determined by its presence. It was the defense of slavery which at last led to the secession of the Southern States and the outbreak of war. Antagonism to slavery from the humane and moral point of view had increased with great rapidity in the North, the pioneers among the anti-slavery movement being Benj. Lundy, E. P. Lovejoy, Wm. Lloyd Garrison, Wendell North was strongly against slavery at the outbreak of the reIt had been abolished in Phillips, Chas. Sumner, and others. The sentiment of the bellion, although there was by no means unanimity of opinion as to the wisest way to get rid of it. states in the early days of the Union, begin ning with Vt. 1777 Slavonia. Pro Slavonic (or SLA Slavs, or SLAVONI Sleidan, or Phili Sleigh. Vehicle o rock mass upon anoth just cover SLAVONIA-SLOPE LEVEL ith Vt. 1777, and ending with N. J. 1804. The emanciof the slaves preceded the close of the war. passed an act abolishing slavery in the Territories, and Congress . Pres. Lincoln issued the proclamation of emancipaIn 1864 the constitutional amendment was passed aboland forever prohibiting slavery throughout the U. S. 7 was introduced into Va. 1619, and excluded from Territory 1787. Importation of slaves was prohibited The Mo. Compromise was enacted 1821, repealed 1854. gitive Slave Bill was passed 1850, repealed June 13, 1864. Ed Scott decision was made 1857. Abolition of slavery in - of Columbia April 16, 1862; Lincoln's first emancipaoclamation Sept. 22, 1862; second, Jan. 1, 1863. -n of slavery was officially proclaimed Dec. 18, 1865. The onia. Province of Austria-Hungary, now forming ROATIA (q.v.) the province of Croatia-Slavonia. s the whole of the angle between the Drave and Save and, on the Save, forms the n. boundary of Servia. onic (or SLAVIC) Languages. Russian and RutheLittle Russian); Bulgarian, Servian, and Kroatian; Bohemian, and Moravian, with other dialects. The garian, into which Cyril translated the Bible ab.1000, opted as the sacred language of the Greek Church. Russian, now growing in importance, the Servian is nt for its ballads, to which J. Grimm called attention ppreciative review. It , or SLAVONIANS. Branch of the Aryan family, first about the Carpathian Mts. s, Bulgarians, Illyrians, Lechs (including Poles, SibeTo this stock belong the nd Pomeranians), Bohemians, and Polabians, or Slavic En. Germany. D. State of rest of the intellectual and voluntary acof the body manifested by the cessation of the autoctivity of the brain. The physical basis is not definitely ned. It is possibly an example of the vital cycle of , where rest follows activity, as seen in the more quences of the heart. See DREAMING. per. Piece of timber laid upon the earth and supporter timbers or railroad track; in England, CROSS-TIE a railroad track. ping Table. Stationary ore-dressing apparatus, simne BUDDLE (q.v.) in principle, but worked by hand. of Plants. Many flowers close in the night, and es also fold up. Some flowers are open a portion of as with the Crocus, in the morning; some are open night only, as the Night-blooming Cereus, a species The closing of plants protects the sensitive parts oling and wetting. S. an, or Philippsohn, JOHANNES, 1506-1556. German h. Vehicle on runners, used in all countries where vick. See SCHLESWIG. ensides. Smooth polished or striated surface, freseen in regions where the rocks have been much disy geological causes; produced by the rubbing of one ss upon another under great pressure. or SLIP. In Mining, nearly identical with Fault. Joint. Mechanical device to limit the effects of the on when the drill strikes the rock. See JAR. I, JOHN, 1793-1871. M.C. from La. 1843-45, U.S. SenB-61; Commissioner C.S.A. to France with James M. 361; arrested on a British vessel Nov. 8, 1861, by CAPT. ES (q.v.), but soon released on demand of England. Rule. Instrument for making rough multiplicaA divisions, the principle being that of logarithms. Valve. Most usual form of valve for distributing the two ends of the engine cylinder, and allowing its and through the proper interval. Devised by James In the surface upon which the valve slides are three openings, called ports. The two extreme ones comrespectively with the two ends of the cylinder betravel of the piston; the central one communicates open air or with the Positions of a Slide Valve. 1403 side is a cavity whose length equals the distance between will be seen that any the inner edges of the steam ports, and whose breadth is the length of the ports. It motion of the valve to admit steam to one end, when the piston is at that end, and the valve opening of the passage in its central position, is accompanied by an from the other end into the cavity which is always in connection with the exhaust port. This kind is called a D valve, and has been moving to open the port in the opposite direction to that of the last motion of the piston; in pumps it is often desirable to have the valve open by a motion in the same direction as the previous piston stroke, and the valve is called a B valve from its resemblance in section to a letter on its side, there being two cavities. In the ALLEN VALVE (q.v.) steam comes also over a passage in the shell over the cavity into the port, as well as at the end. To shorten the passages for steam, the valve is often separated into two parts coupled by a rod, so that the steam ports are short for conduction of heat, but the exhaust passage is long. To enable an early cutoff to be attained without impeding or disarranging exhaust, one valve slides on back of another, the upper cutting off admission to ports made in the lower valve, which carries the exhaust cavity, and releases and compresses exhaust steam at proper and fixed points. The slide valve may be driven by an eccentric or crank directly, or through a rock-shaft, or through a link-motion, or by cams. See ADJUSTABLE CUT-OFF, BALANCED VALVES, GRIDIRON VALVE, and LINK-MOTION. Sliding Friction. That arising when one surface slides upon another. This is greatest at the moment when motion begins. Slimes. In ore dressing, particles of ore and rock that get reduced to a condition of great fineness and are easily carried along in a slowly moving current of water. Slime Table. Ore-dressing apparatus devised for separating and saving the more valuable portions in the slimes, as they are carried in water over the surface of the table. Sline, or SLYNE. The CLEAT (q.v.). whereby stones were hurled; weapon much used in ancient times, as by David against Goliath (I. Sam. xvii.), and till fireSling. Small piece of leather, pierced and held by cords, arms came into use. Slip. See SLIDE. Slipper Flower. Shrubs of the genus Calceolaria, natural family Scrophulariaceae, natives of the Andes of S. America; much cultivated for ornament. Slit. Narrow opening in one end of the collimating telescope, which in a spectroscope or spectrometer serves to render parallel the rays falling on the prism or grating. Sloan, SAMUEL, b. 1817 in Ireland. Pres. Hudson River R. R. 1855-62; pres. Delaware, Lackawanna, and Western R. R. since 1867. Sloane, SIR HANS, F.R.S., 1660-1753. Sloane, WILLIAM MILLIGAN, b.1850. Prof. of History at Sloat, JOHN DRAKE, U.S.N., 1780-1867. Captain 1837, Com- Slocum, HENRY WARNER, U.S.A., 1827-1894. Brig.-gen. U. S. Vols. 1861, Major-gen. 1862, serving in Va., Tenn., and Sloe. See BLACKTHORN. the locus is referred to rectangular co-ordinates is dy dx Slope. Angle between an inclined surface and a horizontal The al |