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LIST OF ILLUSTRATIONS. 
PLATES. 
Faces | Faces 
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-Puate 1. Cucumber Leaves attacked by B. | _ PuatE 11. Four Varieties of Potatoes Inoculated 
__ tracheiphilus (colored); also Tubes ad with Bacillus phytophthorus, show- 
Oe eens MANE voy i Soca wees x | ing variable Resistance and differ- 
2. Water-pore Infections on Cabbage ence in Color of Decayed Tissue.. 96 
Leaf (plant No. 402) at end of two | 12, Serradella grown with and without 
MUMMERS oka nlc ais poss Dk» « 58 | Root-nodules on Nitrogen-free Soil. 102 
3. Infections through Stomata in Black 13. Stages in Bacterial wilt of Cucumbers, 
PIE ME UNEES Sao os sic Fes Seis yee 58 | Anacostia, Di'C.5 L804 a5 fas cteecae 210 
4. Early Stage of Infection in Black 14. Six Cucumber Plants destroyed within 
Spot of Plum, showing Bacteria three weeks by B. tracheiphilus as a 
Escaping through Central Rift..... 60 result of Infected Needle-pricks.... 212 
5. Coconut Palms in middle and late 15. No. 1, Effect of Inoculating Squash 
stages of the Budrot.............. 70 Bacillus into Cucumber; No. 2, 
- 5a. Cross-section of a daisy stem between Transmission of Disease by 
~ tumors, showing the tumor strand. 72 PHADYOHCAS. snc tet aiten atop se 214 
Ts! 55. Cross-section of a secondary tumor 16. Two stages of Bacterial Wilt of 
ie fi in a daisy petiole, showing stem | Cucumber due to Inoculations by 
a “ : 0 72 Needle-pricks; No. 1, Inoculated 
; 6. Olive Shoots ‘aioe Tubercle Me- from Cucumber; No.2, from Squash 222 
CO ele 72 17. Brown Stain in Vascular Bundle of 
7. Paris Daisy with leaf showing Sec- Cabbage attacked by Bact.campestre. 
Bb) OMGREY FOMOr =... eee 72 Also tube of Bact. stewarli and of 
8. Result from Inoculating Buct. tume- | Bact. phaseoli (on potato) (colored). 300 
Ae ‘ faciens into Shoots of Oleander, | 18. The Ragged Leaf of Cabbage....... 304. 
- ; Daisy, and Olive................ 90 19. Wakker’s Yellow Disease of Hyacinths 
9. Result from Inoculating Bact. savas- —Inoculated Leaves and Scape, 
fanoi into Shoots of Oleander, and Infected Bulbs (colored)...... 336—-" 
E. es GAS 92 20. Yellow Disease of Hyacinths—Inocu- 
Pe 10. Atrophy and Death of Shoot due to lated Scape, badly Diseased Bulbs, 
i Bact. tumefaciens... ..........4.. 92 and Cultures in Litmus Milk..... 336 
nw - TEXT FIGURES. 
Page. { Page. 
1. Stem of Potato No. 13 (1895) at- Fic. 9. Water-pore Infections of Cabbage 
tacked by Bact. solanacearum..... 5 | Leaves 28 daysafter Spraying..... 55 
2. Peas growing under Sterile conditions 10. Cabbage Plant No. 400, attacked on 
on Gelatin Media................ 23 margins of Older Leaves, 7. e., 
3. Ciri of Bact. mori oozing from Len- through Water-pores, as a result 
ticels on young shoots of Mulberry. 28 | of Pure-culture Inoculations by 
4. The Gum-bud Disease of Carna- SPVAVulle rs sis ba cg Sow h lees 56 
MIGRIO ag nL ttwleieutete Te yea es a. 34 11. Section parallel to surface of Leaf 
5. Gelatin Impression of Helianthus Leaf. 35 through Water-pore region of Cab- 
6. Cross-section of Vascular Bundles of bage attacked by Bacterium cam- 
Cucumber attacked by Wilt show- POSH are cv gitcictionte sacs Uae UES aals 57 
ing location of Bacterial Infection.. 52 12. Earliest stage of Infection in Black 
7. Bacterially Infected (wilted) Leaf of Spot-ob Pitim icc, 'o ed 6 ace 58 
Cucumber gnawed by striped Cu- 13. Natural versus Artificial iatection 3 in 
Cumber Beetles... ei eta e ee 53 Black Spot of Plum.............. 60 
8. Effect of Light Frost on Leaves of 14. Inner Husk of Sweet-corn attacked by 
MER Teh iets cg h es ech eas 54 Bacterium stewartt........4.000045 61 
