ILLUSTRATIONS. 
PLATES. 
Page. Page. 
Pate 1. Frontispiece. PLATE 11. Culture-room, i. e., place for making 
(1) Ferdinand Cohn, founder of mod- Cultures of Bacteria in Still Air.... 104 
ern systematic bacteriology. De- 12. Movable Hood of Wood and Glass, 
ceased. under which Bacteriological Trans- 
(2) Robert Koch, founder of German fers-may: bevinadé;.cc.s ect ancea cece 106 
school of bacteriology, director 13. The Reinhold-Giltay Microtome...... 120 
of the Institute for Infectious 14. Distilled-water Apparatus............ 124 
Diseases at Berlin. 15; LISS OtANnG Das cavcaaa cts te teen 129 
(3) Louis Pasteur, founder of French 16. Zeiss Photomicrographic Stand Ic.... 129 
‘ school of bacteriology. De- 17. Mounted Camera for Enlarging, Re- 
ceased, ducing, and Natural-size Work..... 134 
(4) Dr. Roux, one of the leading spir- 18. Lantern-slide Room..............0005 144 
its of the Pasteur Institute. 19. Black Spot of the Plum.............. 148 
(5) Em. Duclaux, professor i the 20. Bacterial Disease of Broomcorn...... 150 
University of Paris and director 2r. Bacterial Black Spot of Walnut...... 174 
of the Pasteur Institute. De- Bz Wittos Late Stawey asec oe acs uecasae 176 
ceased. 23. Transmission of Wilt of Cucumber 
2. Bacterial Olive-knots produced on by: Tsectss ciisasicasaurs ae fouitiestes 178 
four plants by needle-pricks. tresses 10 24. Brown Rot of Potato. Natural Infec- 
3. Cross-section of Petiole of Musk- tion of Tuber, Artificial Infection of 
melon, showing bundles disorgan- StEAIS: i sivas eccae sae etdielcesceinsand 202 
ee Scitlas had hesphiles. ...+. sd 25. Brown Rot of Potato. Shoots wholly 
= se herded ce tent ays and destroyed by inoculation .......... 202 
Inoaton with Bare soln |g Tomat-plnt inated it Bo 
&2 Zeisa ‘Horizontal . Phototmictographic terium solanacearum.............45 202 
NE Er Pr 27. Bacterial Wilt-disease of Tobacco.... 202 
6. Arnold Steam Sterilizer, Lauten- 28. Young Pear-shoots blighted by Bacil- 
schlager Dry Oven, Hot Plate, and Its GMyOVOTUS..... 0 .ccesccvecdaces 202 
Chamberland’s Autoclave.......... 48 29. Green Pear-fruits eight days after In- 
7. Hydrogen Generator and Wash Bot- oculation with Bacillus amylovorus. 202 
PUES NSE e oni om cease naiacls 56 30. Quince-shoots and Pear-fruits (cross- 
8. Thermostat-room ...............000% 74 section) showing Blight due to 
9. Chamberland Autoclave.............. 84 Bacillus amylovorus...........0.... 202 
10. Engine for furnishing Vacuum and 31. Small Green Apples blighted by Ba- 
CODINMIFESSCU Alls a': ras ai cat des ona 04 cillus amylovoruS........0 cece cece 202 
TEXT FIGURES. 
Page. | Page. 
Fic. 1. Cross-section of Sweet-corn Stem para- Fic. 6. Turnip-root, showing Bundle occupied 
sitized by Bacterium Stewarti......... 4 | by Bacterium campestre and the com- 
2. Cross-section of a Raw Carrot, showing 
wedging apart of Parenchyma Cells 
by Bacillus carotovorus.............. 5 
nes. Detar) Troms Big.. 2s Jes deine ss ose 00 « 6 
4. Turnip-root, showing Bacterium campes- 
tre confined to vicinity of Vessels.... 7 
5. Bacterium campestre. A small portion 
TIS A CUAERED: occ cy ssc ccve even 8d 
mencement of a cavity; a later stage 
PHAM IGG. an ter cocaine ane Secrets II 
7. Cauliflower-petiole, showing Bundle de- 
stroyed by Bacterium campestre...... 12 
8. Melon-wilt due to Bacillus tracheiphilus. 13 
9. Cross-section of Bundle of a Cucumber- 
stem, showing Bacillus tracheiphilus 
restricted to the Spiral Vessels and 
Three pitted Vessels: ¢s.e's¢ <.sc0.00sa0s:s 15 
