ILLUSTRATIONS. 



'LATES. 



Plate i, Frrnitispieco. 



(i) Ferdinand Cnhn, foiniflcr ni mod- 

 ern systemalic l>acteriolo,!;"\- De- 

 ceased. 



(2) Robert KncIi, fonnder ni C/ernian 



schi.ol of liactcriolo.^y. director 

 of the Institute for Infectious 

 1 *iseas^'S at Berlin. 



(3) Louis Pasteur, founder of Frencli 



scliocd ol liaeteriology. De- 

 ceaseil. 



(4) Dr. Rou-x, one of tlie leading .spir- 



its of the Pasteur Institute. 



( 5 ) 1-im. Duclau.x, professor in the 



Uni\-ersity of Paris and director 

 of the Pasteur Institute. De- 

 ceased. 



2. Bacterial Olive-knots produced 011 



four plants by needle-pricks 10 



3. Cross-section of Petiole of Musk- 



melon, showing fiundles disorgan- 

 ized by Bacillus frachciphilus 12 



4. Datura mctclloidcs eight dajs after 



Inoculation with Bacterium solaiia- 

 ccaruiu 16 



5. Zeiss Horizontal Photomicrographic 



Outfit 2G 



6. .Vrnold Steam Sterilizer, Lauten- 



scldager Dry 0\"en, Hot Plate, and 

 Chamberland's .\uti.>clave 48 



7. Hydrogen Generator and Wash Bot- 



tles in use 56 



8. Thermostat-room 74 



9. Chamberland AutocIa\-e 84 



10. Engine for furnishing Vacuum and 



Compressed Air 94 



P:i-r. 



Pr,.'\TE II. Culture-room, /. c . place for making 



Cultures of Bacteria in Still .-Vir.... 104 



12. Movable Hoorl of A\'ood and Glass. 



under which Bacteriological Trans- 

 fers ma>' be made 106 



13. The Reinh..dd-(nlt,Ly Microtome 720 



14. Distilied-water ,\p|jar,itus 724 



75. Zeiss Stand 11a 129 



1(1, Zeiss Pbotomicrograiihie Stand Ic... 129 



17. i\Iounted Camera for Enlarging, Re- 



ducing, and Natural-size Work. .. . 734 



18. Lantern-shde Room 144 



79. Black Spot of the Plun7 14S 



20. Bacterial Disease of Brooii7corn 150 



27. Bacterial Black Spot of \A'alinit 174 



22. 1 )itto, Late Stage 176 



23. Transn7ission of Wilt of Cucumber 



by Insects 1 78 



24. Brown Rot of Potato. Natural Infec- 



tion of Tuber, .\rtilieial Infection of 



Stems 202 



2^ Brown Rot of Potato. Shoots wholly 



destroyed by inoculation 202 



26. Tom.ato-plant inoculated with Bac- 



terium solanaccaruin 202 



27. Bacterial Wilt-disease of Tobacco.... 202 



28. Young Pear-shoots blighted b\' Bacil- 



lus aiiiylo-i'iirus 202 



29. Green Pear-fruits eight (Ia\s after Tn- 



ijculation with Bacillus aiuylm-urus . 202 



30. Quuice-slioots and Pear-fruits ( cross- 



scetion) showing Blight due to 



Bacillus aii:ylcircirus 202 



37. Small Green Apples blighted by Ba- 

 cillus aiuyloi'orus 202 



TEXT FIGURES. 



Etc. 7, Cross-section of Sweet-corn Stem para- Fic. 6. Turnip-root, showing Bundle occupied 



sitized by Bactcrinui Stczuarti 4 liy Bacterium campcstrc and the com- 



2. Cross-section of a Raw Carrot, showing mencement of a c;i\-ity; a later st,age 



wed.ging apart of Parenchyma Cells than Fig. 5 11 



by Bacillus carolovorus 5 "■ Cauliflower-petiole, showing Bundle de- 



3. A Detail from Fig. 2 6 ^ '^"'y'"^ '">' 5'"-''-'-'""' campcslrc ,2 



8. Melon-wilt due to Bacillus trachciphilus u 



4. Turnip-root, showing Bactenum campcs- ^^ Cross-section of Bundle of a Cucumber- 



/,r confined to vicmityotVes,sels,,., 7 ■ stem, showing Bacllus tracheiphilus 



5. Bacterium cauil>estrc. A small portion restricted to the Spiral \'essels and 



of Fig. 4 enlarged 10 ^ Three pitted vessels j- 



i.x 



