458 CHAPTER XXX II I. 



solution of helianthin or Wasserblau until the red only 

 remains in the erythrocytes. 



See also WHITING, Trans. Roy. Soc., Edinburgh, xxxviii, 1896, p. 311. 



822. Kidney. SAUER (Arch. mik. Anat., xlvi, 1895, p. 110) 

 has a thorough discussion of the methods for the study of 

 the renal epithelium. He finds the best fixative is Carnoy's 

 acetic alcohol with chloroform, 88 (three to five hours, 

 washing out with absolute alcohol) . A mixture of nine parts 

 alcohol with one of nitric acid is also good, as is liquid of 

 Perenyi. He stains with iron ha3matoxylin, and after- stains 

 in a very weak solution of Saurerubin in 90 per cent, alcohol, 

 which stains the ciliary plateau. He macerates with iodised 

 serum or one third alcohol, staining afterwards with dahlia. 



