437 
Coflee—Continued, 
rust, 381,407. 
Cold, effect on growth of plants, 296. 
Conidia— 
development, 391. 
formation and separation in Peronosporea), 144. 
relation to sporangia, 50. 
Conifers— , 
diseases, 396. 
fungi, 398. 
Constantin and Dufour, award of prize to, 319. 
Constitutional health of plants, 317. 
Cooke, M. C., 379. 
Copper— 
absorption by soil, 308, 402. 
acetate— 
adhesiveness, 310. 
for grape mildew, 309. 
formula, 12. 
and lime solutions, mixing, 369, 370. 
basic carbonate mixture, notes, 343. 
borate mixture— 
adhesiveness, 204. 
effect on wheat rust, 223. 
formula, 201, 222. 
notes. 343. 
wetting power, 204, 205. 
carbonate— 
analysis, 175. " 
cost, 239, 361. 
formula, 78,173,361,411. 
in ammonia, 17. 
in suspension, formula, 12. 
compounds— 
adhesiveness, 310, 417. 
adulteration, 314. 
for plant diseases, 168, 173, 176. 
toxicology, 309. 
free in Bordeaux mixture, test, 337,368. 
fungicides, effects on weeds, 174. 
gypsum, for grape mildew. 312. 
in foods, 313. 
in potato tubers, 174. 
in soils— 
influence on vegetation, 307, 423. 
reaction, 312. 
in unsprayed grapes, 313. 
on apples, 309. 
on fruit, 307. 
on grapes, 401,402. 
on potatoes, amount, 402. 
on sprayed fruit, 402. 
on tomatoes, 308. 
salts— 
as fungicides, 308. 
injurious to vegetation, 174, 421. 
possible source of danger, 58, 174. 
silicate mixture, 346. 
soda mixture for grape mildew, 312. 
adliesrveness, 310. 
for grape mildew. 312. 
solutions and soil, 313. 
sucrate mixture, 346. 
sulphate— 
absorption by roots, 421. 
action on soil, 312. 
Copper—Continued, 
sulphate—Continued. » 
analysis, 175. 
cost, 239, 361. 
effects on germination of corn, 174. 
for grain, 170. 
for mildew, 167. 
fungicidal value, 173, 312. 
methods of dissolving, 365. 
for peach blister, 103. 
for potato diseases, 173. 309. 
for smut on seed wheat, 175. 
stock solution, 365,366. 
sulphite mixture, 318. 
vitality of seed wheat impaired by, 421. 
Copperas as fungicide, 312. 
Copperdine, analysis, 175, 314. 
Corals, Achlya penetrans in, 271. 
Cordyceps— 
new species, 329. 
notes, 429. 
Corn— 
germination retarded by copper sulphate, 174. 
moldy, supposed cause of staggers in horses, 
191. 
smut— 
experiments, 171. 
influence on cattle, 317. 
notes, 174,410. 
treatment, 421. 
Corrosive sublimate solution- 
treatment for wheat rust, 218. 
use on seed wheat, 204. 
Cortinarius.'new species, 427. 
Cotton— 
anthracnose, 298. 
anthracnose, description. 301. 
black rust, 299. 
disease in Ecuador, 320. 
Doassansia, 48. 
growing in Russia, 159. 
leaf blights, 403. 
plants, diseased, 48. 
root rot, cause, 298. 
rust— 
description, 48. 
in Ecuador, 47, 320. 
Cracking and spotting of— 
fruit and vegetables, 163. 
grapes, 164. 
peaches, 374. 
pears, 405. 
Cranberry- 
diseases, experiments, 163. 
diseases, treatment, 311. 
gall fungus, treatment, 303. 
scald, 170. 
scald, treatment, 303. 
Crittogamia agraria, 51. 
Crown gall on trees, 377. 
Cryptogamic laboratory at Ithaca, N. Y., 401. 
Cucumber— 
diseases, 156,160. 408. 
mildew, 57. 
Peronospora, 62. 
powdery mildew, 408. 
