Notes on analytical chemistry : for students in medicine / by Albert J. Bernays.
- Albert Bernays
- Date:
- 1886
Licence: Public Domain Mark
Credit: Notes on analytical chemistry : for students in medicine / by Albert J. Bernays. Source: Wellcome Collection.
68/160 page 58
![roxides, potassium and sodium acetates. Fibrous: ammonium chloride. Granular crystalline : aluminum sulphate, mercuric chloride, potassium disulphate, fused calcium chloride, glucose, camphor, silver nitrate (sticks), potassium nitrate ( sal prunella, sticks or balls, glob, prunel.), roll sulphur. These may also appear amorphous. Amorphous: (a) opaque ; arsenious anhydride (porcellanous stratified), common caustic potash and soda (sticks or cakes), fused antimonous sulphide (dark-brown), potassium cyanide and nitrite, mangauates (dark green), silicates, zinc chloride (deliquescent sticks), barium oxide. (h) transparent; glacial phosphoric acid (deliquescent sticks or lumps), quartz and mixed silicates (glass), phosphorus (waxy, becomes opaque white, yellow, orange, red), sucrose in the form of barley sugar, [gelatine, soluble albumen, gums, resins, &c.] Gelatinous or flocculent bodies (Colloids). Hydric and many other silicates, most precipitates from solutions of aluminum, iron, chromium, manganese, nickel, and cobalt salts, potassium and barium silicofluorides, calcium fluoride, gelatine, albumen, starch when boiled, &c. Many precipitates, at first flocculent, become granular, or even crystalline, by heat, or standing. Crystalline precipitates. Potassium and ammonium hydro- tartrates, benzoic, hippuric, boracic, arsenious, chromic, uric, gallic, salicylic and picric acids, ammonio- and potassio-platinic chlorides, magnesium and ammonio-magnesium phosphates (minute), plumbic chloride, bromide, iodide, and sulphocyanide, cuprous chloride, barium chloride and nitrate (by strong acids), Bilver acetate, potassic perchlorate, urea nitrate and oxalate. Syrupy liquids. Concentrated solutions of very soluble bodies, such as potassium and sodium hydroxides, potassium car- bonate, zinc and ferric chlorides, tartaric, malic and citric acids, sucrose, &c.; glycerine; phosphoric, arsenic, sulphuric and lactic acids, [gum, albumen, gelatine, &c.] The above list embraces the substances most frequently met with, including a few characteristic ones out of the range of ordinary analysis, and omitting the majority of bodies enumerated in the table of colors. The amorphous powders are too numerous to specify. Opaque, dead-looking powders are usually insoluble in water. If colored, a heavy metal is generally present. Scale preparations, such as citrates and tartrates of iron, simulate crystals, but are irregular in form. Substances may be colored yellowish, brownish, &c., by impurity; this is frequently the case with glucose, tannin, alkaloids, malic, uric, and meconic acids. Pulverization generally diminishes color in proportion to the fineness of the division; sometimes the tint is removed or entirely changed. As a rule, colored bodies, if soluble in water, give solutions of the same or similar hue, ferri-](https://iiif.wellcomecollection.org/image/b21499056_0068.jp2/full/800%2C/0/default.jpg)
