BULLETIN OF THE BUSSEY INSTITUTION. 
least liable to rot, 335; some varieties 
seem to resist disease, 835; when frozen, 
may be saved as sour fodder, 372. 
Potatoes, rotten, as distinguished from 
those affected by the disease called po- 
tato rot, 332. 
Potato-leaf, structure of, in health and in 
disease, 320. 
Potato-pulp, composition of, 376. 
Potato rot, absurdity of treating it with 
nostrums, 334; cannot occur in the ab- 
sence of moisture, 323, 335; no evi- 
dence that it is caused by insects, 332, 
333 ; influence of previous crops upon 
the, 331, 336; palliatives for, 335; pa- 
per on, 319; precautions that should be 
observed, 335 ; how propagated from 
year to year, 327 ; questions concerning, 
that were addressed to farmers by the 
Royal Agricultural Society, 331; time 
of its appearance, 320, 335. 
Potato starch, refuse from, preserved as 
sour fodder, 372. 
Poultry, humane destruction of, 48. 
Powder-mills, analysis of waste from, 383. 
Power of land to yield crops is limited, 
129, 311. 
Prices of fertilizers, 16, 170, 185, 306-313, 
379 et seq. 
Prune-stones, analysis of, 373; proportion | 
of meat to husk in, 374. 
Prunus Americana, is said to be subject to 
the black knot, 451, 453. 
Prunus Chickasa, the question whether it 
be subject to the attacks of a fungus, 
449, 451. 
Prunus maritima, appears to be free from 
the black knot, 451. 
Prunus Pennsylvanica, is subject to the 
black knot, 451; and should be de- 
stroyed as a pest, 452, 453. 
Prunus serotina, is free from the black 
knot, 450. 
Prunus Virginiana, is very subject to the 
black knot, 440, 450; and should be 
destroyed as a pest, 452, 453. 
Prussiate residues, alkalinity of, 381, 
390 ; analysis of, 380; proportion of 
potash in, varies, 381. 
Puccinia Malvacearum, or hollvhock fun- 
gus, attacks wild mallows, 330; migra- 
tion of, 330. 
Pumpkins, composition of, 367 ; fodder 
value of, 369. 
Pyrenomycetes, descriptions of different 
states of development of species of, 407 ; 
list of species of, found near Boston, 438. 
QUINCE-TREE, a fungus of the, 411. 
RApiswH, white mould on the, 329. 
Rain, injurious to experimental crops, 103. 
Rain-fall, violence of, in New England, 
159. 
Nain-water, proof that the impurities of, 
have very little influence upon the 
growth of highly organized plants, 284. 
467 
Rape-cake, fails to fertilize land in dry 
seasons, 279. 
Rats, injury done by, to experiments with 
barley in 1871, 85. 
Rhytisma Vitis, a fungus on American 
grape-vines, 415. 
Rock phosphates, are readily assimilated 
by plants in moist soil, 65. 
Rocks of New England, amounts of pot- 
ash contained in some specimens, 161. 
Roots, composition of several kinds, 367; 
fodder value of, 369; when frozen, 
may be saved as sour fodder, 372. 
Rostafinski, Dr. J. T., reference to his 
work on Mvxomyecetes, 430. 
Rowen, composition of, 353. 
Rubidium, detection of, in ash of the ox- 
eve daisy, 73. 
Rum-cherry, the tree, so called, is free 
from the black knot, 450. 
Anal the common, analysis of hay from, 
348. 
Rush-salt-grass, analysis of hay from, 341. 
Rust, of grain, 331. 
Ruta-baga, amounts of fertilizers taken 
off the land bv, 116; field experiments 
with, 85, 104, 121, 162; large-sized 
plants obtained by use of mixed fertil- 
izers, 125; trouble from worthless seed, 
104. 
Rye, growth of, in coal-ashes, 67; the 
question whether the rye crop has an 
influence upon the potato rot, 332, 336. 
Rye straw, composition of, 353; specula- 
tions as to its fodder-value, 359. 
SALT and lime mixture, for composts, 391. 
Salt-cake, see Sulphate of Soda. 
Salt-marsh grass, analyses of hay from, 
341. 
Salt-marsh hays, analyses of, 339; fodder 
value of, 360; history of use of, in New 
England, 354; reasons why now in dis- 
repute, 356. 
Salt marshes, drainage of, 361 ; perma- 
nent fertility of, 356. 
Saltonstall, Henry, his computations of 
cost of importing superphosphate of 
lime, 173-179; field experiments by, 
137, 188; superphosphate made at his 
farm, 187. 
Saltpetre, reasons why it cannot. profita- 
bly be used as a manure, 385. 
Saltpetre waste, from powder-mills, anal- 
yses of, 383; field experiments with, 
385; is liable to vary in composition, 
384 ; will probably be worth more to 
the farmer henceforth, than formerly, 
385. 
Sanborn, F. G., examination of larve in 
hen dung, 24. 
Sand culture, results obtained by, in vari- 
ous experiments, 54-69, 256. 
Sargent, C. S., catalogues of ligneous 
plants in Arnold Arboretum, 205, 456 ; 
reports on Arnold Arboretum, 293, 455. 
Schleesing, his method of estimating phes- 
phoric acid, 200. 
