806 CHAPTER XXII. 



This mass is yellow in the capillaries and brown in the 

 larger vessels. 



496. RANVIER'S Gelatin Mass for Impregnation (Traite, 

 p. 123). Concentrated solution of gelatin, 2, 3, or 4 pai'ts ; 

 1 per cent, nitrate of silver solution, 1 part. 



497. Other Colours. HOYER'S Green (Biol. Centralb., ii, 1882, p. 19). 

 Made by mixing a blue mass and a yellow mass. THIERSCH'S Green (Arch. 

 f. mik. Anat., 1865, p. 149). ROBIN'S SCHEELE'S Green (ROBIN, Traite, 

 p. 37). HARTING'S White (see FRET, Le Microscope, p. 190). FREY'S 

 White (ibid.). TEICHMANN'S White (ibid., p. 191). FOL'S Brown (Zeit. 

 f. wiss. Zool., xxxviii, 1883, p. 494). MILLER'S Purple (see Amer. Mon. 

 'MIC. Journ., 1888, p. 50; Journ. Roy. Mic. Soc.. 1888, p. 518; Zeit. f. 

 iviss. Mik., v, 3, 1888, p. 361). FOL'S Lead Chromate (Lehrb., p. 15). 

 ROBIN'S Cadmium (his Traite, p. 36). THIERSCH'S Lead Chromate 

 (Arch. f. mik. Anat., 1865, p. 149). HOYER'S Lead Chromate (ibid., 

 1867, p. 136) ; or, for any of these, previous editions. 



