METALLIC STAINS (IMPREGNATION METHODS). 261 



LEBEH, ibid.'). Sulphides (see LAXDOIS, Centralb. f. d. mcd. Wiss., 

 1885, No. 55 ; and GIEBKE, in Zeit.f. iviss. Mile., i, 1884, p. 497). Molyb- 

 date of Ammonium (MERKEL ; KEAXTSE) (see GIEKKE, Zeit.f. wiss. Mik., 

 i, 1884, p. 96). Oxychloride of Ruthenium (NICOLLE and CANTACUZENE) 

 (see Ann. Inst. Pasteur, vii. 1893, p. 331). Ruthenium Red (Ruthenium 

 Sesquichloride) (EiSEX, Zeit.f. wiss. Mik., xiv, 2, 1897, p. 200; in my 

 hands totally useless). Impregnation with Fats, Altmann's Method 

 (see post, "Corrosion"). 



