LIST OF ILLUSTRATIONS. xi 



FIG- PAGE 



185. Spirillum tyrogenum, , 553 



186. Colonies of Spirillum tyrogenum, 563 



187. Spirillum Metschnikovi, 564 



188. Penicillum glaucum, .......... 624 



189. Miquel's aeroscope, 625 



190. Hesse's aeroscope, 627 



191. Miquel's flask, 629 



192. Straus and Wiirtz's soluble filter, 629 



193. Petri's sand filter, 630 



194. Sugar filter, 631 



195. Sedgwick and Tucker's apparatus, 631 



196. Sternberg's vacuum tube, 637 



197. Lepsius' apparatus for collecting water at various depths, . . . 638 



198. Koch's plate method, 639 



199. Smear preparation from liver of yellow-fever cadaver, .... 675 



200. Bacillus cadaveris grandis, 675 



