274 CHAFTEIi XX. 



411. MEYEK'S Salicylic Vinegar Preservative Solutions (Arclt. 

 mik. Anat., xiii, 1876, p. 868). Solution of salicylic acid in 

 pyroligneous acid and glycerin. See previous editions. 



412. NOLL'S Salicylic Vinegar and Gum Medium (Zool. Anz., 

 1883, p. 472). A mixture of MEYER'S fluid and medium of 

 FARRANTS. See previous editions. 



413. DEANE'S Mediurn (see Micro. Diet., art. "Preservation "). 



414. HOYEE'S Gum with Chloral Hydrate or Acetate of Potash 

 {Biol. Centralb., ii, 1882, pp. 23-4; Journ. Roy. Mic. Soc. [N. S.]. iii, 

 1883, pp. 144-5). A high 60 c.c. glass with a wide neck is filled two thirds 

 full with gum arabic (in pieces), and then either a solution of chloral (of 

 several per cent.) containing 5 10 per cent, of glycerin is added, or officinal 

 solution of acetate of potash or ammonia. The gum with frequent shaking 

 dissolves in a few days, and forms a syrupy fluid, which is slowly filtered 

 for twenty-four hours. The clear filtered fluid will keep for a longtime, 

 hut if spores of fungi begin to develop a little chloral can be added and the 

 fluid refiltered. The solution with chloral is for carmine or htematoxvlin 

 objects that with acetate for anilin objects. 



415. Medium of FARRANTS (BEALE, How to Work, etc., p. 58). 

 Picked gum arabic . . . .4 ounces. 



Water . . . . . 4 



Glycerin . . . . 2 ,, 



To be kept in a stoppered bottle with a lump of camphor. 

 Slightly different receipts for this are given by the Micro- 

 graphic Dictionary, and A. F. STANLEY KENT, in Jouni. -Z?"//. 

 Mic. Soc., 1890, p. 820. 



416. Gum and Glycerin Medium (LANGERHANS, Zool. Anzeitj., ii. 

 1879, p. 575). 



Gumini arab. . . . . .50 



Aquae . . . . . . 5'0 



To which after twelve hours are added 



Glycerin! . . . . . . o'O 



Sol. aquosa acid, carbol. (5*100) . . . 10 



417. FARIS'S Glycero-gum (The Microscope, x, 1890, p. 59; Jonr,t. 

 Hoy. Mic. Soc., 1890, p. 414). Gum arabic 2 ounces, glycerin 1'5 ounces, 

 water 1'5 ounces, thymol 1 grin. Mix, dissolve with heat, and filter. 



418. Gum and Glycerin Jelly (SnmEU, The Microscope, ix. 18SH. 



