APATHY'S DOUBLE STAIN. 341 



681. Myelon of Reptilia and Amphibia. Besides the usual methods 

 which will suggest themselves as being applicable to this class of objects, 

 see MASON'S methods, supra, 671 ; SCHMIDT, Zeit. f. wiss. Mik., 1885, 

 p. 389; v. LENHOSSEK, Arch.f. mik. Anat., 1886, p. 379 (minute directions 

 for dissecting out the spinal ganglia of Uana) ; KOEYBUTT-DASZKIEWICS, 

 Ibid., 1889, p. 51 ; or Zeit.f. wiss. Mik., vi, 2, 1889, p. 203 ; OSBOBN, Journ. 

 Roy. Mic. Soc., 1885, p. 536, or WHITMAN'S Methods, p. 195). 



681 a, APATHY'S double stain for differentiating nervous 

 tissue and connective tissue (Zeit. f. wiss. Mik., vi, 2, 1889, 

 p. 170) consists of staining with Heidenhain's haematoxylin, 

 and after-staining with very weak alum haematoxylin. 



