526 



MICRO-ORGANISMS IN WATER 



Hamburg water supply, 152-154 



chemical analysis of, 305 



and cholera epidemic, 305- ! 



306 



Harpoon, bacterial, 36 

 Helvolus, B., 444 

 High-pressure steam steriliser, 3 

 Holz's method for detection of 



typhoid bacillus, 271 

 Hot-air steriliser, 4 

 Hyalina, Sarcina, 507 

 Hyalinus, B., 437 

 HydropJiilus fuscus, B., 431 



discovery of, in water, 260 



Hydrosulfureum Pontictim, B., 



458 



Ice, bacterial contents of, 85-88 



behaviour of bacteria in, 252, 

 255 



Incanus, B., 465 



Indol-reaction 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 



Janthinus, 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 



Buber, B.) 



action of light on, 352, 



353 

 Koch and Weigert's modification of 



Ehrlich's solution, 46 

 Koch's steam steriliser, 2 

 Konigsberg water-supply, 146-150 

 Kiihne's carbolic methylene blue 



solution, 46 



Lactis aerogenes, 412 

 Lactis cyano genus, 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 

 ' Lemon-yelloio ' bacillus, 445 

 TLieptotlirix ochracea, 513 

 Leucomelancum, Spi rill inn, 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 

 Limniat, river, bacteria in, 96-98 



