220 EXAMINATION AND PRESERVATION MEDIA. 



It may be used as a mounting medium, but there is always risk 

 of the sugar crystallising out. 



FABRE-DOMERGUE (Bull. Soc. Philomath, ix, 1899, p. 115) dis- 

 solves 200 parts of sugar in 400 of water, and adds 1 part of formalde- 

 hyde, and camphor to saturation. 



411. Chloral Hydrate. 5 per cent, in water (LADOWSKY, Arch.f. 

 mik. Anat., 1876, p. 359). 



Or, 2-5 per cent, in water (BRADY, British Copepods). 

 Or, 1 per cent, in water (MuNSON, Journ. Roy. Mic. Soc., 1881, 

 p. 847). 



Mercurial Liquids. 



(I give these as examination media only, not as permanent mounting media 

 Media containing sublimate always end by making tissues granular.) 



412. GILSON'S Fluid (CARNOY'S Biologic Cellulaire, p. 94). 

 Alcohol of 60 per cent. . . . .60 c.c. 



Water . . . . . . . 30 ,, 



Glycerin . . ... . . . 30 ,, 



Acetic acid (15 parts of the glacial to 85 of 



water) . . . . . . 2 ,, 



Bichloride of mercury . . . .0-15 grm. 



413. GAGE'S Albumen Fluid (Zeit.f. iviss. Mik,, 1886, p. 223). 

 White of egg ...... 15 c.c. 



Water 200 



Corrosive sublimate ..... 0-5 grm. 

 Salt ....... 4 grms. 



Mix, agitate, filter, and preserve in a cool place. Recommended 

 for the study of red blood-corpuscles and ciliated cells. 



414. PACINI'S Fluids (Journ. de Mik., iv, 1880 ; Journ. Roy. Mic. Soc., 

 [N.S.] ii, 1882, p. 702, and early editions of this work). Antiquated and 

 superfluous. They consist essentially of corrosive sublimate of from | 

 to J per cent, strength, with the addition of a little salt or acetic acid. 



415. GOADBY'S Fluids (Micro. Diet., art. "Preservation," or early 

 editions of this work). Quite unsuited for histological purposes. 



Other Fluids. 



416. Chloride and Acetate of Copper (RIPART et PETIT'S fluid, 

 see 90). 



417. Tannin (CARNOY, Biol. Gellulaire, p. 95). Water 100 grins., 

 powdered tannin 0-40 grm., as an examination medium only. 



418. WICKERSHEIMER'S Fluid (Zool. Anz., 1879, p. 670). Worthless 

 for histological purposes. 



