CHAPTER XXIII. 245 



with caustic potash acetate of potash, which constitutes a mounting 

 medium (see BEHRENS, KOSSEL, and SCHIEFFERDECKER, Das 

 Mikroskop, i, 1889, p. 156). See also GAGE, Proc. Amer. Soc. of 

 Microscopists, 1889, p. 35. 



520. Baryta-water, Lime-water (FoL, Lehrb., p. 110). Baryta-water 

 will macerate nerve, muscle, and connective tissue in a few hours, lime- 

 water in a few days. 



521. Sulphoeyanides of Ammonium and Potassium (STIRLING, Journ. 

 Anat. and Phys., xvii, 1883, p. 208). 10 per cent, solution of either of 

 these salts, for epithelium. Macerate small pieces for twenty-four to 

 forty-eight hours. 



SOULIER (Travaux de VInst. Zool.de Montpellier, Nouv. S6r., 2, 1891, 

 p. 171) has found that STIRLING'S solution greatly deteriorates cellular 

 elements, but that good results are obtained by combining it with a 

 fixing agent. The best results were obtained with a 2 per cent, solution 

 of sulphocyanide combined with liquid of KIP ART and PETIT ; good 

 ones, by combining liquid of RIPART and PETIT with artificial serum of 

 KRONECKER instead of sulphocyanide, or with pepsin, eau de Javelle, 

 10 per cent, sulphate of soda, or 1-5 per cent, solution of caustic soda ; 

 also by combining solutions of chloride of sodium, or solutions of 

 caustic potash or soda, with any of the usual fixing agents. 



522. LANDOIS'S Solution (Arch. mikr. Anat., 1885, p. 445). 

 Saturated sol. of neutral chromate of 



ammonia ..... 5 parts. 

 Saturated sol. of phosphate of potash . 5 

 Saturated sol. of sulphate of soda . 5 



Distilled water 100 



Small pieces of tissue are macerated for one to three, or even 

 four to five days, in the liquid, then brought for twenty-four hours 

 into ammonia carmine diluted with 1 volume of the macerating 

 liquid. 



GIERKE particularly recommends this liquid for all sorts of 

 macerations, but especially for the central nervous system, for 

 which he finds it superior to all other agents. It is also recom- 

 mended for the same purpose by NANSEN (v. Zeit. wiss. Milk., v, 

 1888, p. 242). 



523. Bichromate of Potash. 0-2 per cent. 



EISIG (Fauna u. Flora Golf. Neapel, 16 Monog., 1887, p. 297) 

 macerates Capitellidse in 0-5 to 1 per cent, solution for months or 

 years, a little thymol being added against mould. 



Miiller's Solution, diluted to same strength, or combined with 

 saliva, has also been used. 



BROCK (for nervous system of Mollusca, Intern. Monatssch. Anat., 



