LIST OF ILLUSTRATIONS. x j 



FIG. PAGE 



185. Spirillum Metschnikovi, 512 



186. Penicillum glaucum, 542 



187. Miquel's aeroscope, 543 



188. Hesse's aeroscope 545 



189. Miquel's flask ' 547 



190. Straus and Wurtz's soluble filter, 547 



191. Petri's sand filter 548 



192. Sugar filter, 549 



193. Sedgwick and Tuckers apparatus, 549 



194. Sternberg's vacuum tube, 554 



195. Lepsius' apparatus for collecting water at various depths, . . . 555 



196. Koch's plate method, 556 



197. Smear preparation from liver of yellow-fever cadaver, .... 586 



198. Bacillus cadaveris grandis, 586 



199. Micrococcus of Freire, from a gelatin culture, ' G09 



200. Culture of Freire's micrococcus in nutrient gelatin, .... 609 



201. Streptococcus coli gracilis, . 610 



202. Streptococcus cadaveris, 612 



203 Streptococcus Ha vaniensis, 612 



204. Streptococcus liquefaciens, from anaerobic culture in nutrient gelatin, . 613 



205. Streptococcus liquefaciens ; culture in nutrient gelatin, . . . 613 



206. Micrococcus tetragenus versatilis, from a single colony in nutrient 



gelatin, 614 



207. Micrococcus tetragenus ; culture in nutrient gelatin, .... 614 



208. Sarcina lutea, 616 



209. Ascococcus Billrothii, 618 



210. Bacillus cyanogenus, 627 



211. Bacillus arborescens, from a gelatin culture, 633 



212. Colony of Bacillus arborescens 633 



213. Bacterium termo of Vignal, from a bouillon culture 642 



214. The same from a culture fifteen days old 642 



215. Bacillus ubiquitus 644 



216. Bacterium Zopfii, 655 



217. Bacillus scissus, 657 



218. Bacillus scissus; superficial colony on gelatin plate, .... 657 



219. Bacillus circulans, 664 



220. Bacillus diffusus, from a gelatin culture 667 



221. Bacillus diffusus; superficial colony in nutrient gelatin, . . . 667 



222. Bacillus vermicularis, 668 



223. Bacillus mesentericus vulgatus, from a culture in bouillon, . . . 673 



224. Bacillus mesenteriqus vulgatus, from an agar culture 673 



225. Bacillus megatherium, 674 



226. Bacillus subtilis, 678 



227. Bacillus ulna of Vignal, 681 



228. Bacillus buccalis maximus 683 



229. Colonies of Bacillus muscoides, 687 



230. Colonies of Bacillus polypiformis, 688 



231. Bacillus butyricus, . 689 



232. Colonies of Bacillus liquefaciens magnus, 690 



233. Colonies of Bacillus liquefaciens parvus, 691 



234. Colony of Bacillus radiatus, 691 



