472 BULLETIN 
Phosphoric acid, amount of, in some 
rocks, 7. 
Pigeons, sometimes subsist on cherry- 
stones, 324; dig up peas, 329; 
sometimes feed on grubs and 
worms, 330. 
Pigments, eaten by mice, 264. 
Pig-weed, analyses of, 127. 
Pine-wood, chemical composition of, 
392, 414; products from acid hy- 
drolysis of, 440. 
Pinus strobus, method of growing, 
373; time of cutting, 377. 
Pith of elder is free from starch, 444 
note. 
Plantago major, analyses of, 123. 
Plantago lanceolata, analyses of, 124. 
Plantain leaves, analyses of, 123, 124. 
Plants, loss of fertilizing matters on 
leaching them, 40. 
Porcupine eats bark of trees, 390. 
Portulaca oleracea, analyses of, 126. 
Potash, amount of, in some rocks, 7. 
Potash carbonate agglutinates soils, 
344; ferments humus, 347. 
Potash salts, used together with lime, 
351. 
Potassic fertilizers, act in various 
ways, 343; are specially useful for 
leguminous plants, 359; often fail 
to give remunerative results, 363. 
Potato, feeding value of, 138, 139, 140. 
Pumpkins, analyses of, 81, 221; feed- 
ing value of, 150. 
Purslane, analyses of, 126. 
Putty, eaten by mice and rats, 264, 278. 
QUARTZ-ROCK and sand contain traces 
of potash and phosphoric acid, 10. 
Rain-waTeR, fitness of, for experi- 
ments on plant growth, 314. 
Rats eat painters’ putty, 278. 
Reed canary-grass 
analyses of, 130. 
Reversion of sugars by acids, 441. 
Rice, feeding value of, 138. 
Rocks, analyses of, 7; pulverized as 
manure, 14. 
Root-wood from sugar maple, 443. 
Rotatory power of sugars, formulas 
for computing specific rotation, 
and quasi-specific rotation, 439. 
Rumex crispus, analyses of leaves of, 
255. 
Rye, grown as grass, 152. 
SALIX PURPUREA and viminalis, 430 
et seq 
(ribbon-grass), 
OF THE BUSSEY INSTITUTION. 
Salts (sodium chloride, ete.) may in- 
jure the texture of soils, 355; floc- 
culate muddy waters, 357. 
Sand, buckwheat grown in, 159. 
Sand culture applied to the assaying 
of soils, 292. 
Sands, potash, lime and phosphoric 
acid in; 10, 17% 
Sawdust, chemical composition of, 
46; for feeding animals, 47; is not 
digested by animals, 398. 
Scallop-shells, analyses of, 178, 188. 
Scouring-rush, analyses of, 166; may 
be harmful, 169. 
Sea-snail shells, analyses of, 188. 
Seeds, of clover, often fail to be di- 
gested by animals, 320; sometimes 
resist water, 317; of Danthonia 
germinate readily, 340; of weeds 
often do not germinate readily, 
289; resist digestive juices of ani- 
mals, 320. 
Shales, potash, lime and phosphoric 
acid in, 8, 18. 
Shave-grass, see Scouring-rush. 
Sheep-skin, tanned, has little or no 
value as a fertilizer, 65. 
Shell-fish, analyses of their shells, 
176. 
Shorts, composition of, 153. 
Skimmed-milk, feeding value of, 138, 
146. 
Slade, Prof. D. D., paper by, on the 
art of the farrier, 1. 
Slate-rock, potash and phosphoric 
acid in, 8. 
Soils, ‘‘assaying” of, by way of 
sand culture, 292; formation of 
carbonate of lime in, when they 
are dry, 195. 
Sorghum, composition of seeds of, 99. 
Spheeria morbosa, or black knot, 106. 
Squashes, composition of, 81. 
Starch, amounts found in trees, 389, 
437, 440, 448; methods of estimat- 
ing, 389, 391, 437; microscopic 
observations on, 443,-note ; more 
in roots than in trunk-wood, 4438. 
Starch-grains, xylan in, 419. 
Starch-sugar, see Dextrose. 
Stassfurt potash-salts and lime, 351. 
Storer, F. H., papers by, on the agri- 
cultural value of spent dye-woods 
and tan, 26; American experience 
on varied action of potassic fertil- 
izers, 348; amounts of potash and 
phosphoric acid in rocks, 7; anal- 
yses of leaves of yellow-dock, 255, 
of seeds of broom-corn, 94, of 
