An Introduction to Pharmaceutical ChemistryJ. van Voorst, 1867 - 447 pages |
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Page 1
... oxygen . The various paragraphs are printed in differently spaced type : those in the wider direct a student in his operations ; those in the closer con- tain explanations of each operation , and are to be carefully read before ...
... oxygen . The various paragraphs are printed in differently spaced type : those in the wider direct a student in his operations ; those in the closer con- tain explanations of each operation , and are to be carefully read before ...
Page 4
... OXYGEN . Preparation . As oxygen is the most abundant element in nature , forming , though in a combined state , about one - half of the whole weight of our globe , it may safely be assumed that this element can readily be obtained in ...
... OXYGEN . Preparation . As oxygen is the most abundant element in nature , forming , though in a combined state , about one - half of the whole weight of our globe , it may safely be assumed that this element can readily be obtained in ...
Page 5
... oxygen is quickly evolved . Before applying heat , however , pro- vision should be made for collecting the gas . Collection of Gases . - Procure a piece of glass tubing about the thickness of a quill pen , and a foot or eighteen inches ...
... oxygen is quickly evolved . Before applying heat , however , pro- vision should be made for collecting the gas . Collection of Gases . - Procure a piece of glass tubing about the thickness of a quill pen , and a foot or eighteen inches ...
Page 6
... oxygen . On the large scale , oxygen may be made in the same way , larger vessels being employed . Less heat also will be necessary if the chlorate of potassium be previously mixed with very fine sand , or , still better , with about a ...
... oxygen . On the large scale , oxygen may be made in the same way , larger vessels being employed . Less heat also will be necessary if the chlorate of potassium be previously mixed with very fine sand , or , still better , with about a ...
Page 7
... oxygen supports combustion , These tests of the presence of oxygen may of course also be applied at the extremity of the delivery - tube whilst the gas is being evolved . ( It is desirable to retain two tubes of the gas for use in ...
... oxygen supports combustion , These tests of the presence of oxygen may of course also be applied at the extremity of the delivery - tube whilst the gas is being evolved . ( It is desirable to retain two tubes of the gas for use in ...
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Common terms and phrases
acetic acid acid gas acidulous radical add solution alcohol alkaline aluminium ammonia analysis Analytical Reactions antimony aqueous solution arsenic arsenicum Atomic weight barium basylous bismuth boiling British Pharmacopoeia calcium carbonate of potassium carbonate of sodium carbonic acid carbonic acid gas chemical chloride of calcium chromate of potassium colour compounds containing copper crucible crystals cyanide dilute dissolved distilled drop elements ether evaporated excess ferric ferrous filter filtrate formula glass grains grammes H₂O heat hydrate hydrochloric acid hydrocyanic acid hydrogen hyposulphite insoluble iodide of potassium iodine iron lead lime liquid magnesium mercury metal mixture molecular weight molecule neutral nitrate of silver nitric acid obtained odour officinal ounce oxalic acid oxide oxygen perchloride phosphate phosphoric acid platinum potassium prepared present produced pure residue salt small quantity soda sodium specific gravity starch substance sulphate sulphide sulphuretted hydrogen sulphuric acid sulphydrate of ammonium Synthetical test-tube tion tube washed yellow yield zinc
Popular passages
Page 326 - ... is the weight of a bulk of water equal to the bulk of the light body. For instance, a piece of wood weighing 12 grammes (or grains) is tied to a piece of metal weighing 22 grammes, the loss of weight of the metal in water having been previously found to be 3 grammes.
Page 324 - To express the same thing by rule, divide the weight in air by the loss of weight in water, the resulting number is the specific gravity in relation to 1 part of water, the conventional standard of comparison.
Page 362 - ten grains dissolved in water, and nitrate of silver added in excess, give a precipitate which, when washed with water and afterwards with half an ounce of solution of ammonia, and dried, weighs 12-5 grains.
Page 318 - Millilitre = 1 cub. centim. or the mea. of 1 gram, of water 1 Centilitre= 10 „ 10 „ „ 1 Decilitre = 100 ,. 100 „ „ 1 Litre =1000 „ 1000 ,, (1 kilo.) MEASURES OF LENGTH. 1 Millimetre = the thousandth part of one metre, or...
Page 279 - ... measures agitated with an equal volume of water are reduced to 45 by an absorption of 10 per cent...
Page 376 - ... minims of hydrochloric acid, and allow it to macerate for twenty-four hours. Transfer the whole to a small percolator, and after the fluid has ceased to drop, add at intervals about an ounce and a-half of similarly acidulated water, or until the fluid which passes through is free from colour.
Page 306 - ... and, stirring the whole together assiduously, continue the evaporation at a temperature not exceeding 140° F. until the extract is of a suitable consistence for forming pills.
Page 377 - Take of Opium 100 grains; Slaked Lime, 100 grains; Distilled Water, 4 ounces. Break down the Opium, and steep it in an ounce of the water for twenty-four hours, stirring the mixture frequently. Transfer it to a displacement apparatus and pour on the remainder of the water in successive portions, so as to exhaust the Opium by percolation. To the infusion thus obtained, placed in a flask, add the Lime ; boil for ten minutes, place the undissolved matter on a filter, and wash it with an ounce of boiling...
Page 305 - For educational practice either of the above-named five raw materials may be employed ; but in order that attention may be concentrated on the process by which the extracts are prepared, rather than on any one of the extracts themselves, it suffices to make an extract of some ordinary green vegetable, such as cabbage or turnip-tops. Bruise the green leaves of a good-sized cabbage in a mortar, and press out the juice; heat it gradually to 130° F., and remove the green flocks of chlorophyll which...