■216 



THE AMERICAN MONTHLY 



[November, 



rapidly, and the spindle-sliaped fibres 

 stand out clearly, but tlie ]:)repara- 

 tions are not jjermanent. 

 124. Norner. Beitrag zur Behand- 

 lung mikroskopischer Prapa- 

 rate. Arch. mikr. Anat.. 

 xxi. 351. 

 Magdala red anilin is highly pi^aised 

 as quick, intense, and ditlerentiating. 

 May. be applied to alcoholic and 

 chrome preparations. Besides ani- 

 mal tissues it is especially recom- 

 mended for plants, and especially 

 the lower fungi. The preparations 

 appear permanent, bvit are not yet old 

 enough to rely on. 

 i2v Certes. On the processes of col- 

 oring liying micro-organisms. 

 Amer. Micr. Journ., vol. 

 iii, p. 334. vSur les proced^s 

 de coloration des organismes 

 vivants. Note complemen- 

 taire. Bull. Soc. Zoo!. 

 France, 1S81, p. 21,226. 

 Another method of staining unicel- 

 lular beings. A drop of alcoholic 

 solution of cyanin, Bismarck brown, 

 etc., is placed on a glass slip, and 

 spread. The alcohol evaporates, and 

 when nearly dry put on the drop of 

 water containing the infusoria that 

 will be Cjuickly stained. (See no). 



126. Weigert. Zur Technik der 



Mikroskopischen Bacterien- 

 untersuchung. Arch. Path. 

 Anat. u Phys., IxxxIa , 375. 

 The best description of the appli- 

 cation of anilin dyes in pathological 

 investigations, and especially as re- 

 lates to micro-organisms, is in Fried- 

 lander's book. 



127. Koch. Die Aetiologie der Tu- 



berculose. Berl. klinische 

 Wochenschrift, 1882, No. 15. 

 Ditto. M i tt h e i 1 u nge n des 

 Kaiserl. Gesundheitamtes. 



128. Friedlander. Mikroskopische 



Technik, etc., Kassel und 



Berlin, 1882. 

 The following process is given by 

 Koch for demonstrating tubercular 

 bacilli : — The section, or dry prepar- 

 ation, is put for 24 hours in a mix- 

 ture of distilled water 200. concen- 



trated alcholic solution methyl blue 

 10, 10 per cent, caustic j^otash, 0.2. 

 From this the dark blue sections are 

 put in a concentrated aqueous solu- 

 tion of vesuvin for 15 minutes. 

 Then wash, dehydi'ate with alcohol, 

 clear up in oil of cloves. Nuclei 

 and micrococci will be brown, the 

 bacillus of tubercle a deep blue. 

 \_'ro be continued.^ 



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