64 MICRO-CHEMICAL REAGENTS. 



C till the color disappears, rinsed in pure water, 

 which restores a little of the color, floated on B 

 a few moments, transferred to absolute alcohol, 

 and finally dried and mounted in Canada balsam. 

 The Bacillus of consumption is stained by the 

 magenta, which does not color putrefactive bac- 

 teria, and so differentiated in the brown sputum. 1 

 W. T.] 



The above coloring matters are those which are 

 most commonly employed in micro-chemistry, and 

 .which give the best results. There are some 

 others which are used for various purposes, but 

 they may be omitted here. 



1 The Lancet, Aug. 5, 1882. 



