INDEX. 
ABSORPTIVE power of coal ashes, 78. 
Acorns, composition of, 376. 
Acre of land, weight of the soil upon, 
258. 
Agriculture of New England compared. 
with that of Europe, 168. 
Albuminoids, meaning of the term, 28. 
Alkalies, action of on vegetable mould, 
280, 387. 
Alkaline soaps, a remedy for Californian 
orange disease, 41+. 
Alkalinity, of ashes, discussion of its sig- 
nificance, 387; of ashes from husk of 
cotton seed, 387, 390; of prussiate resi- 
due, 381; of slurry, 3886; of wood-ashes, 
389; its money value to the farmer, 
* 390. (Compare Alkali-power). 
Alkali-power, attempt to compute its 
ota value, 390; meaning of the term, 
7. 
American grape-vines, mildew on, 415. 
Ammonia, amount contained in anthracite, 
398, in soils, 266, 400, in waters, 266; 
is found in copperas, in pyritous lig- 
nites, and in alum shales, 402; is 
formed in processes of oxidation, 402 ; 
is not abundant enough in air or rain 
to support the higher orders of plants, 
267. 
Ammonium salts, field experiments with, 
92, 108, 119, 143, 301. 
Analyses, of fertilizers, 8, 170, 185, 191, 
378; of fodders, 25, 339, 362, 373, 
standard method for, 26; of peats, 16, 
135, 267; of rocks, 161; of soils, 136, 
258 ; of wood-ashes, methods employed 
for, 194. 
Anatomy, a knowledge of important to 
the farmer, 286. 
Animals, humane destruction of, 40; 
methods of slaughtering, 41; should 
not be alarmed before slaughtering, 40. 
Antennaria elwophila, identical with Fu- 
mago salicina, 410. 
Anthracite, contains ammonia, 398, but 
no nitrate or nitrite, 402 
Anthracite ashes, agricultural value of, 
50; are no better than sand, 56; chemi- 
cal examination of, 70; contain lithium, 
72, phosphoric acid and potash, 66, 70 ; 
experiments in growing plants in, 52; 
matters dissolved from by water, 77; 
power of absorbing or fixing potash, 
78, of holding water, 75; soluble sili- 
ca contained in, 76; use of in the earth 
closet, 67, for mixing with guano and 
other corrosive manures, 67. 
Apocrenic acid, a nitrogenous body, 280. 
Apples, analyses of, 365; composition of 
contrasted with that of roots, 367; con- 
tain but little albuminoid matter, 366 ; 
experiments on feeding swine with, 
367; fodder value of, 362, compared 
with that of potatoes, 369; prejudice 
against as cattle food, 362; should be 
fed in conjunction with flesh, beans, 
and the like, 367. 
Apple-orchard has comparatively little 
tendency to exhaust land, 372. 
Appleton, F. H., obtains prices of English 
superphosphates, 177. 
ae Zoology, importance of its study, 
286 
Arnold, James, gift to President and Fel- 
lows of Harvard College by the Trus- 
tees of his estate, 6. 
Arnold Arboretum, catalogue of plants in, 
295, 456 ; established at the Bussey In- 
stitution, 6 ; reports of the director of, 
293, 455. 
Ascomycetes, list of species found near 
Boston, 437. 
Asexual spores, 324-329. ; 
Ash, of bran, contains little or no carbonic 
acid, 30; is rich in phosphates, 39; 
meaning of the terms ‘pure’ and 
‘* crude’ ash, 30. 
Ashes (compare Wood-ashes and Coal- 
ashes) of anthracite, agricultural value 
of, 50, no better than sand, 56, 58, con- 
tain phosphoric acid and potash, 66, 
70, experiments of growing plants in, 
52, use of, in the earth closet, 67, for 
mixing with guano and other corrosive 
manures, 67. 
Ashes, from the husk of cotton seed, an- 
alysis of, 387; large proportion of in 
the bark of trees, 250; from leached 
dye-woods contain much lime, 397; of 
manure are used as a fertilizer in south- 
