LIST OF ILLUSTRATIONS. XI 



FIG. PAGE 



185. Spirillum Metsclmikovi, . 604 



186. Penicillum ghiucum, ... 614 



187. Miquel's aeroscope, .... . . 615 



188. Hesse's aeroscope 617 



189. Miquel's flask, 619 



190. Straus and Wurtz's soluble filter, 619 



191. Petri's sand filter, '. 620 



192. Sugar filter, 621 



193. Sedgwick and Tuckers apparatus, 621 



194. Sternberg's vacuum tube, . 627 



195. Lepsius' apparatus for collecting water at various depths, . . . 628 



196. Koch's plate method, ... 629 



197. Smear preparation from liver of yellow-fever cadaver, . . 665 



198. Bacillus cadaveris grandis, . . 665 



