528 



MICRO-ORGANISMS IN WATER 



of 



Paisley water supply, 150, 151 



Pararosaniline colours and Grain's 

 method, 49, 50 



Parietti's method for detection of 

 typhoid bacillus, 272 



Pasteur, culture solution, 26 



Pathogenic bacteria, detection of, 

 in water, 257285 



vitality in water of, 286-332 



insolation and virulence of, 



385-387 

 list of, found in water, 398 



Peroxide of hydrogen, action of, on 

 bacteria in water, 244-247 



generation of, during inso- 

 lation, 389390 



Petri culture-dish, 34 



Apparatus for counting colo- 

 nies on, 34 



Phenol broth and detection 

 typhoid bacillus, 272-276 



Phosphor escens indicus, 13., 451 



indigenus, B., 452 

 gelidus, B., 451 



Photobacteriographs, 360-362 



Photobacterium luminosum 

 Argenteo pliospliorescens lique 

 faciens) 



Photographic record of plate- 

 cultures, 80-82 



Picrocarmine solution, 49 



Pigments, bacterial, action of light 

 on, 347, 351 



Pipettes, cleaning and sterilisation 

 of, 79 



Plicatile, Spirillum, 409 



Plicatus, B., 459 



Plumosus, M., 494 



Pneumoniae, B., vitality in water 

 of, 325 



Potato cultures, 20-24 



gelatine, 22 



acidity and alkalinity of, 23 



- growth of cholera bacillus on, 

 23 



glanders bacillus on, 24 



B., prodigiosus on, 20 



Pressure, effect of high, on bact- 

 erial contents of water-filtrates, 

 1,48, 126-128, 148-150, 151, 154- 

 157 

 Prodigiosus, B., 410 



growth on potatoes of, 20 



- vitality in seltzer-water of, 240 

 behaviour in ice of, 252 



Proteus fluorescens, B., 421 



detection of, in water, 259 

 vulgaris, B., 420 

 behaviour of, in ice, 252 



- mirabilis, B., 420 



- ZenJceri, B., 421 

 Pseudo-anthracis, B., action of light 



on sporulation of, 360 

 Pseudo-cholera spirillum, 403 

 Pumping, effect of, on bacterial 



contents of well-water, 103-105 

 Punctatus, B., 486 

 Pure cultures by means of solid 



culture media, 7-9 



liquid culture media, 



24, 28, 29 

 Purification of water for drinking 



purposes, 117-216 



by agitation with solid 



particles, 193-205 



- sewage, 159-169, 205-216 



- water by insolation, 370-384, 

 392, 393 



Clark's process, 190, 



191 



Gaillet and Huet's pro- 

 cess, 191 



- Rockner-Rothe's pro- 

 cess, 192 



Putrificus coli, B., 486 

 Pyogenes aureus, Staphylococ.cus, 



498 



Pyocyaneus, B., 424 

 vitality in water of, 327 



- action of light on, 348, 353, 372 

 Pyrogallate of potash solution for 



anaerobic cultures, 41 



Radiatus aquatilis, B., 459 

 Badiatus, M., 503 

 Rain, bacterial contents of, 88 

 Bamosus, B. (' Wurzel-bacillus '), 



419 

 Red pigment, bacteria producing a, 



439-442, 477, 496, 497 

 Beitenbachii, Sarcina, 507 

 Reservoirs, storage of water in, 184- 



190 



use in America of, 189 

 Reticularis, B., 435 

 Rhine, river, bacteria in, 98 

 Aniline-water' 1 Bacillus (Burri), 



483 

 Micrococcus (Burri), 491 



