Yellow ochre is also frequently found below the vial gravel, generally covered with a lamina of pan or thin crust of conglomerate, and sometimes taining iron in botroidal and dendritic forms.

It occurs at the White Cliffs very pure and in 1 quantity, but is only exposed at extreme low w During the embargo which preceded the war of 1 two ships from Boston were loaded with it from place.

Used as a pigment, it combines readily with of water; and when burnt gives a lively red color.

On the lands of Dr. White, Section 35, Townshi Range 3 W, in Hinds County, my attention was ca to a mineral earth occupying a spot of small exten the surface, to which stock of all kinds resorted for salts which it seems to contain, and which they lick eat freely, and all with impunity except the hog, w is said to be destroyed by the use of it.

Dr. White has observed that it has the effect of ch ing the skin of the hog to a red color; that the car crow seems to reject the carcass, which resists putr tion to a considerable degree, and dries up, and cures animal matter is said to do in some parts of Mexico

Other deposits of similar character have freque been met with of limited extent. They are gener entirely destitute of vegetation, and in their nat state neither corn nor cotton will grow upon them.

The application of cotton seed and a crop of pea renders them temporarily productive, and the grow crop, when so improved, has been observed to resist drought in a remarkable degree.

Many of our streams are characterized by the g deposit of fine white sand which they afford.

Pearl, Leaf, and Chickasaw Rivers, in some part

rse, are of this character, as well as some of the reams in the western counties.

ifferent branches of Cole's Creek, in the Counties son and Adams, are remarkable in this respect; crossing of them is rendered difficult and dangerthe occurrence of every freshet, in consequence tensive beds of quicksands in their channels. For building purposes, is to some extent a mere commodity, and is supplied in New Orleans is Cliffs.

cliffs are some two miles or more in extent, ut two hundred feet high, presenting in some rpendicular sections of pure sand and clays. ontinually ply from that point, and gangs of re continually engaged in loading flats for the eans market.

ontract for sand from the White Cliffs, for the house in New Orleans, amounted to upwards of ight thousand dollars, and in this connection it mentioned that several boat-loads of pebble and erate were obtained from the talus of the Bluffs for the foundation of the same building, hat of the State House in Baton Rouge.

the State at large, the ferruginous sand depotly predominate; they are seen on the Missisy at Fort Adams overlying the diluvial gravel. ead widely over the County of Wilkinson, and sed in heavy deposits in every ravine or natural Associated with the plastic clays, conglomerate, el; passing thence eastwardly through Amite, 1 Marion Counties.

can be traced almost uninterruptedly east of ver from the sea-shore to the Tennessee line, ng, as it were, between the prairie lands and

the western alluvium. Sections on the railroad Brandon are given in PLATE XII., Figs. 2 and 3.

It would be tedious and unnecessary to enumera the localities where these deposits have been encoun in force. The following are some of them :

On the shore of Lake Borgne a few miles w Shieldsborough. In Hancock County, seventeen north of Habolochitto Bridge. In the northwest c of Perry County, near Leaf River. In Marion Co west of Pearl River, four miles from Columbia. Col. Dabney's, Township 4, Range 3 W., Hinds Co

Three miles east of Hooper's Ferry, on Pearl I in Leake County, on the road to Tacinto PostNear De Kalb, in Kemper County. About seven south of Macon, in Noxubee County. Near Gre Yellobusha County. Near Pontotoc, and a few west of Ripley, in Tippah County.

In sinking wells at Oxford and other places, the encountered at some depth often presents delicate ro and lilac tints.

MARLS OR MINERAL FERTILIZERS.

The term marl is often very vaguely applied b ferent writers; and the names variously given t mineral substances sometimes used as renovators o soil, do not always convey a clear idea of their distin character or properties.

In Europe, a non-calcareous earth is used as marl; and slate-marl, gypseous marl, bituminous or marl, and variegated marl, &c., are frequently spoko the latter, a marbled earth containing sulphate of and certainly very unfit to be used as a marl, howe may be called.