INDEX. 



Abbe condenser, 20 



Abrin compared with bacterial toxins, 



189 



immunity from, acquired by in- 

 jections of, 209 



Abscesses, bacteria which cause, 284 

 pathological process involved, 



282 

 metastatic, caused by S. pyogenes 



aureus, 290 

 pathological process involved, 



2*90 



Absorbent cotton for plugging test- 

 tubes, 76 

 saturated with pyrogallic acid for 



anaerobic cultures, 91 

 Accidental infection of laboratory 



workers, 115 



Acid, acetic, for decolorizing back- 

 ground of cover-glass prep- 

 arations, 29 

 for tissues, 41 



as product of growth of bac- 

 teria, 131 



in Welch's capsule stain, 49 

 alcohol for decolorizing after 



stains for tubercle bacilli, 35 

 aniline dyes which are not suitable 



for bacterial stains, 28, 35 

 boric as an antiseptic, 257 

 butyric, formation of by B. 



butyricus, 270 

 by various bacteria, 131 

 carbolic, as a'germicide, 250 

 as end-product in the growth of 



bacteria, 129 

 germicidal power enhanced by 



hydrochloric acid, 251 

 neutralized by sodium sul- 

 phate, 245 



neutralized by lime, 251 

 in Ziehl's carbol-fuchsin stain, 



34 



Acid, formic, as a product of bacterial 



growth, 131 

 fuchsin not suitable for bacterial 



stains, 28, 35 



hydrochloric, with carbolic acid as 

 germicide, 251 

 with corrosive sublimate for 



disinfecting purposes, 249 

 as germicide in gastric juice, 



164 

 hydrochloric-alcohol as decolor- 



izer, 35 

 lactic, as product of bacterial 



growth, 131 

 in sour milk, 157 

 formed by B. acidici lactici and 

 other bacteria of the same 

 group, 131 

 picric, as contrast stain for tissues, 



28 

 propionic, formed by bacterial 



growth, 131 



pyrogalic, for cultivating anae- 

 robes, 91 

 rosolic, for detection of acid 



formed in cultures, 73 

 sulphuric, in Gabbett's decolor- 



izer, 35 

 as decolorizer with other stains, 



Acid-proof bacilli, branching forms in 



suppurative and necrotic lesions 



and in bronchopneumonia, 370 



in butter, in cow dung and on 



grass, 351 



in gangrene of the lung, 351 

 in milk, 151 



in smegma preputialis, 33, 163 

 resist decolorization with acids, 33 

 retain the stain after treatment 



with Gabbett's solution, 36 

 Acids, formation of, by bacteria, 131 

 Acquired immunity, 200 



443 



