65. 
67. 
78. 
79. 
82. 
83. 
87. 
. Gelatin-streak culture of B. 
LIST OF ILLUSTRATIONS. 
Page. 
. Wound Reaction (third day)in Pricked 
Potato-leaf, plant No.6r......... 
Leaf of Cucumber Plant No. 91, show- 
ing Pricked and Wilted Area (the 
MROMPE NABE) Glo cc as Gias assess 
. Progress of Wilt in 8 days on Inocu- 
lated Leaf of plant No. 113........ 
Cross-section of Inoculated Plant No. 
149 at extreme top of stem, showing 
Infection of all the bundles....... 
. Lamina of Squash-leaf (in section), 
showing the Bacteria confined to 
the bundle although Wilt involved 
. Infected Bundle of Inoculated Musk- 
pre 0. Gn Oe 
. Sketch of Swollen Bacteria from the 
Interior of Vine No. 199.......... 
. Wilt of Inoculated Winter Squash at 
end of 9 days, plant No. 215....... 
. Progress of Wilt in Inoculated Squash 
leaf on plant No. 216............. 
. Inoculated Squash-leaf on plant No. 
. Wilt on Leaves of Cucumis melo, var. 
dudaim, plants 276,277.......... 
. Wilt on Inoculated Leaf of Cucurbita 
californica, plant No. 280......... 
. Cross-section of Petiole of Inoculated 
Leaf of Cucurbita foetidissima 
(Plant 273), showing Bacteria con- 
fined to the Vascular Bundles..... 
Detail from Vascular Bundle of Cucur- 
bita foetidissima occupied by B. 
MOCREEPRUUSS 6.0.6.0 5.3 vee vgs ese 
Single Spiral Vessel of Cucumber Stem 
in cross-section, showing Lumen 
plugged by B. tracheiphilus........ 
. Cross-section of Petiole of an Inocu- 
lated Squash-leaf—12 bundles oc- 
cupied by B. tracheiphilus....... 
Cross-section of a Squash Bundle 
destroyed by B. tracheiphilus. It 
also shows occupation of surround- 
Camera drawing of unstained B. 
tracheiphilus from stem of a Wilted 
Cucumber from the field (1893).... 
Sketches of dividing rods of B. 
tracheiphilus after staining with 
SIPRLE OF EIGER? 5 es evoreees eset 
. Flagellate rods of B. tracheiphilus, 
capsule also stained.............. 
. Gelatin-stab cultures of B. trachei- 
trach- 
EB OA, ace ee ee 
Petri Dish Agar Poured-plate of B. 
tracheiphilus at end of 6days...... 
239 
242 
247 
250 
251 
252 
256 
258 
259 
261 
265 
269 
269 
272 
273 
285 
286 
287 
288 
288 
288 
288 
Fic. 
88. 
89, 
gi. 
92. 
. 93- 
94. 
95- 
96. 
97. 
98. 
99. 
100. 
Io!. 
102. 
103. 
104. 
105. 
106. 
107. 
108. 
109. 
110. 
Itt. 
112. 
113, 
VII 
Page. 
Small portion of Agar Poured-plate at 
end of 7 days in thermostat....... 
90. Enlarged Colonies of B. trachei- 
Streak Cultures of B. tracheiphilus, 
showing discrete growth.......... 
Behavior of B. tracheiphilus in Fermen- 
Pationstubed sas 5 weve: cpeessi ayes. 3.85 
Simple apparatus used for Testing 
Growth in Hydrogen............. 
Restricted growth of B. tracheiphilus 
on a Slant Agar Streak buried under 
MEG SOUS oa. scare cutta tance ¢gcele 8 oe 
Restricted growth of B. tracheiphilus 
in Acetic Acid Agar.............- 
Crystals in old Litmus-milk Cul- 
tures of B. tracheiphilus.......... 
Germicidal Action of Sunlight on B. 
CACHED RURS acdcs8 Porediea ees Oar 
Cabbage-leaf showing upward move- 
ment of Brown Venation due to 
Bact. campestre......... arate 
Dwarfing and Loss of Leaves in 
Cauliflower attacked by Bact. cam- 
Head of Cabbage showing Blackened 
Vascular Ring due to Bact. cam- 
Cauliflower Stem from Texas, show- 
ing Blackened Vascular Ring due 
to Bact. campesire.............04. 
Cross-section of Petiole of Cabbage, 
all the bundles of which are black- 
ened by Bact. campestre........... 
Cauliflower Stems from Florida, show- 
ing disease further advanced, 7. e¢., 
cavities in the pith............... 
Cross-sections of Kohlrabi showing 
Blackened Vascular Bundles in 
UATE Cr eae 
Stem of Collards attacked by Bact. 
COMPESILE Bases iso Sho Big eb.0, 59.04 seks 
Turnip-root hollowed out by Bact. 
CONDISIE 8.55.65 550 nas Kas the tae 
Cavity in fleshy part of Kohlrabi due 
£0 Bach: COMPOSE sish.5 oes hoo ans ie 
Cabbage-leaf showing wedge-shaped 
area of Bacterial Infection (Black 
Venation) attributed to insect 
Cross-section of Cauliflower Petiole 
showing tissues occupied by Bact. 
COMPOSITE a dcccc sete rdi anes sinsee 
A detail front fig: 109.04. .0s.0808006 
Cross-section of Turnip-root showing 
two vessels, one fully occupied by 
GCE CONDESWE icc os. Soa ee wees 
Longitudinal section of Turnip-root 
showing bacteria in a vessel....... 
114. Bacterium campestre occupying 
Intercellular Spaces. .......... 315, 
291 
291 
292 
293 
294 
295 
295 
296 
297 
301 
302 
303 
303 
304 
305 
310 
316 
