CONTENTS. 
Page. 
PEMIOUOCTIOIN 31 sto cco Oe: ee Ry Lol: 3 
WES Pty. fF a heeds fy hw Seay Loe eae ene 7 
The Earliest Workers.................00.0. 7 
The General Attitude of Pathologists and Bac- 
PORIONURISES Cit ares eae at ah neue Ga 9 
MARPLGUEEC Sy acticin cla Aske ale eis os Rave t's 21 
GENERAL CONSIDERATIONS................... 23 
On the supposed normal occurrence of Bacteria 
Mi) PROEIER Aare paral latd ecb ahe Weis Grok eas 23 
RRR AUEEO Gere a ot se E loch we os es 27 
Bacteria on the Surface of Plants.............. 28 
Obstacles to their Entrance into Plants— 
Obstacles to their Multiplication in 
MyGIG sa pei cals as eae OBS Sei 28 
The Epiphytic species.................... 30 
MMERMIRR ee IER Fas 5 3 sia arrest ly jae CE 35 
The Entrance of Bacteria into Plants. The Ques- 
tion of Parasitism—What Constitutes 
Rie RACAAIEO PS = oratalaincd oc > oie etre Ow 36 
The Carriers of Infection................. 40 
RIDECING DHICARES <2 oslo sn. edna es ease enve as 40 
The Experimental Production of Parasites... 41 
RUM OLE Co) See Ses S-Gok Stee, Teo ie ode ae 50 
Inception and Progress of the Disease.......... 51 
Miaster- OF MOCO. ses ieee’ 51 
IW GRE MSCCEIONS 35 occ cvwseeaseees 51 
Infection through Natural Openings. .... 54 
Nectarial Infections................. 54 
Water-pore Infections. ..... A dae aout 56 
Stomatal Infections...............:.. 57 
Lenticellate Infections................ 63 
Extrafloral Nectaries—The Stigma.... 64 
Rewoed Ob Tactbation. 6566s ce eee 64 
Pmrmtion Ol Disease... ieee ses 66 
MEM OTOEAMIIE Ts os 5c 5a Gee sad tekers eves 67 
umpes Attacked... os... 0. cueeesee san 69 
Mass-action of Bacteria.................. 70 
Secondary Tumors and Metastasis........ 71 
MEME ic netics a oak ds od aGna's hoes 75 
Solvent Action of Bacteria—Destruction of 
Middle Lamella—Bacterial Solution 
of Cell-walls—Fermentation of Cellu- 
lose—Destruction of Wood.......... 76 
RMEEMNI TI. Clie avin e's Cee tlieie abittes, OP: 89 
Reaction of the Plant:................0.003 90 
REE CIRCE Sree PO a 90 
MEMES ONES 3 38 c08 3's 3 ot nasheeds bsiden'es gI 
0 A ee ee ne eee 92 
Enlargement of the Nucleus.............. 92 
Changes in the Chromosomes............. 93 
Page. 
Inception and Progress of the Disease—Cont’d. 
Reaction of the Plant—Continued. 
MAAC IOCIE Sis are 5. ate.b cere ba cane no et EG auc 8 Mt 93 
RACERS So Sy,5 5 cin 88 ao MTG os Dian OTRO 94 
Individual and Varietal Resistance—What 
Constitutes Immunity? Immune 
Varieties—Intra-varietal Selection— 
Cross-breeding for Resistance—Is it 
Possible by Special Foods to obtain 
Resistant. Plants? ¢.. Presses «4 eps ore 95 
PATE MOR ES cde SG Alaa: da-w, sis eista oer in eke 96 
Root-nodules of Leguminosae............. 97 
Synonymy of Bact. leguminosarum...... 99 
Summary of Leading Papers............. 100 
ESCTATUT S355 cisas5s Ps sayin tds HENRI ee 138 
Bacterial Symbiosis in other Green Plants.. 147 
Inseetivorous Plants. . .%....@ oscsasees ss 147 
Bacteria in Hop Glands................. 153 
Parteria wit Alea, ois... Besa vite eee 153 
Biteraiuaete peter tas ais bas wedi ete baa te Bi 154 
Bacterial Symbiosis in Cryptogams........ 155 
Bacteria withiiWeasts: . 2.5... eles 155 
MCN OME atte = 3 Seed aliens. alae me 155 
The Ginger-beer Plant...:........... 162 
The So-called ‘'Beer Seed’’........... 166 
BaGceria Wits PUN. es cose cas tee 168 
Bacteria with Myxomycetes............ 169 
One Bacterium with Another........... 172 
PARP e NTE Sea nk ha sss ta lee ols 173 
Are any Bacteria known to cause Disease in 
both Plants and Animals—Evidence 
from Inoculating Plant Parasites into 
Animals—Evidence from Inoculating 
Animal Parasites into Plants—Do 
Animal Parasites Inoculated into Plants 174 
Plant Parasites Inoculated into Animals.... 181 
Inoculations of Bacterium tumefaciens into 
Hisit atid NrOgS Aa sheo vardnaceeres 182 
Do Plants Harbor Animal Parasites........ 184 
Pitefatires.aic nics th eoacks ataaee seins 187 
Eiyriebe Of Plants. 26.056 cies eacunvawnds os 188 
Recovery by Excision. ..6 50.0500 cece cis 191 
GOTHIC OSs cn 8 sc res ie pe een eo eis 192 
Germicidal Treatment of Seeds............ 196 
Germicidal Treatment of Dormant Plants.. 201 
Germicidal Treatment of Growing Plants... 201 
VBOChiCides S. 55.5.6 pass aG.zinie a Kale ee a eee Sh 202 
Formulas... stadostens Sh Guseeeaets 204 
PE RPPRERE OG .55. 9:4 ais Rive Bier oe 28 ae <Taahans 206 
