52(5 



MICRO-ORGANISMS IN WATER 



Hamburg water supply, 152-154 



chemical analysis of, 305 



and cholera epidemic, 305- 



306 

 Harpoon, bacterial, 36 

 Helvolus, B.^ 44:4: 

 High-pressure steam steriliser, 3 

 Holz's method for detection of 



typhoid baciUus, 271 

 Hot-air steriliser, 4 

 Hyalina, Sarcina, 507 

 Hyalinus, B.^ 437 

 HydropJiihis fuscus, B., 431 



discovery of, in water, 260 



Hydrosulfureum Ponticum^ B., 



458 



Ice, bacterial contents of, 85-88 



— behaviour of bacteria in, 252, 

 255 



Incanus, B., 465 



Indol-reactiou and typhoid bacillus, 

 273 



and cholera bacillus, 281 



Inoculation of test-tubes, 37 



— of guinea-pigs with cholera ba- 

 cillus, 282 



— of marmots with cholera ba- 

 cillus, 282, 399 



Insolation of bacteria {see Light) 



Inunctus, B. 464 



Iridescens, B., 465 



Iron sponge for filtration purposes, 



169-171 

 . agitation experiments with, 



194 

 Irrigation and bacterial purification 



of sewage, 167-169 

 Isar, river, bacteria in, 95 



action of light on, 373 



Isolation of micro-organisms, 28 

 by dilution, 24, 28, 29, 73- 



76 

 gelatine-plate cultures, 



30-33, 76-79 

 gelatine-dish cultures, 



34 

 gelatine-tube cultures, 



35 



Janthi/nus, B., 472 

 Jaundice fever induced by bathing 

 in foul water, 259 



Jelly, high temperature, 14 

 — silica, 17 



Katrine, Loch, bacteria in, 110 

 multiplication of bacteria in 



water from, 230 

 Kiel, Bacille rouge de (see also 



jRuher, B,) 

 action of Hght on, 352, 



353 

 Koch andWeigert's modification of 



Ehrlich's solution, 46 

 Koch's steam steriliser, 2 

 Konigsberg water-supply, 146-150 

 Ktihne's carbolic methylene blue 



solution, 46 



Lactis aerogeneSj 412 

 Lactis cyanogenusj B,, 478 

 Lactis viscosus, B., 479 

 Lakes, bacteria in, 97, 109-112 

 Lambeth Company's filter-beds, 



bacterial examination of, 137- 



139 

 Latericeus, B., 439 

 Lea, river, bacteria in, 89, 90, 119- 



124 

 multiplication of bacteria in 



raw water of, 219 

 * Levion-yellotv ' bacillus, 445 

 Leptothrix ochracea, 513 

 LeucomeJaneum, Spirillum, 408 

 Levelling apparatus for plate- 

 cultures, 32 

 Light, action of, on micro-organisms, 



333-393 

 in water, 370-384, 



392, 393 

 virulence of pathogenic 



bacteria, 385-387, 392 

 in purification of water, 



393 

 Lime-water for water purification 



and softening, 190-192, 196, 201, 



202 

 Lime, agitation of water with, 201 

 — purification of sewage with, 205 

 copperas and, 206, 



207 

 ferric sulphate and, 



208 



, alum and, 208-210 



Limmat, river, bacteria in, 96-98 



