Tincture of guaiac, diluted to a light sherry-wine color (keep in a dark-glass bottle). Turpentine, "ozonized" (p. 89). * * * * * Acid, boric, for preserving urine (p. 48). Acid, oxalic. Acid, salicylous (salicyl aldehyd), 10 per cent. alcoholic solution. Alcohol, amylic. Alcohol, ethyl, absolute. Alcohol, methyl (pure). Barium chlorid mixture (p. 62). Benzol. Boas' reagent or Günzburg's (p. 219). Boggs' reagent (p. 280). Calcium chlorid, 1 per cent. solution. Canada-balsam in xylol: necessary only when permanent microscopic preparations are made. Carbon disulphid. Charcoal, animal. Chromium trioxid. Congo-red, strong alcoholic solution. Copper sulphate. Diluting fluid for blood-platelet count (p. 167). Egg-albumen discs in glycerin (p. 221). Ether, acetic, pure. Florence's reagent (p. 285). Formalin (40 per cent. solution of formaldehyd gas). {291} Iodin crystals. Iron sulphid. Lead acetate (sugar of lead); used in 10 per cent. solution to clarify urine. Lead acetate, tribasic. Lime-water. Magnesium carbonate. Müller's fluid saturated with mercuric chlorid (p. 37). Pepsin, U.S.P. Phenylhydrazin hydrochlorid. Potassium ferrocyanid, 10 per cent. solution. Potassium persulphate. Ruhemann's reagent (p. 69). Silver-nitrate crystals; also dram to the ounce aqueous solution, and "ammoniated" solution (p. 68). Sodium alizarin sulphonate, 1 per cent. aqueous solution. Sodium carbonate. Sodium chlorid, 2 per cent. solution; from this, normal salt solution (0.8 per cent.) can be made as desired. Sodium hyposulphite. Sodium nitroprussid. Sodium sulphate. Stains: Anilin-gentian violet (p. 38). Bismarck-brown, saturated aqueous or alcoholic solution. Ehrlich's triple stain for blood. Eosin, 0.5 per cent. alcoholic solution for blood. Fuchsin, weak solution; can be made when desired by adding a little carbol-fuchsin to a test-tube of water. Gentian-violet, saturated alcoholic solution. Goldhorn's spirochæte stain (p. 283). Methylene-blue and borax solution (p. 193). Methylene-blue, saturated aqueous solution for blood. Sulphur, powdered. {292} Trichloracetic acid solution (p. 71). Uranium nitrate, 5 per cent. aqueous solution. Xylol. Zinc, arsenic free. II. WEIGHTS, MEASURES, ETC., WITH EQUIVALENTS METRIC Meter (unit of length): Millimeter (mm.) = 1/1000 meter. Centimeter (cm.) = 1/100 meter. Kilometer = 1000 meters. Micron (µ) = 1/1000 millimeter. Gram (unit of weight): Milligram (mg.) = 1/1000 gram. Kilogram (kilo.) = 1000 grams. Liter (unit of capacity): Cubic Centimeter = 1/1000 liter. Same as milliliter (ml.). 1 Millimeter = 0.03937 (1/25 approx.) in. 1000 microns.