VOLUMES ONE TO TWENTY-FIVE. 



71 



Food mauufactui-ed ; observations on the 

 recently introduced manuftxctured 

 foods for agricultiu-al stock (J. B. 

 Lawes), xix. 199 ; tlieii- cost, ib. ; and 

 comi^osition, 200 ; flavour of anise, 

 cumin, &c., the price four times that of 

 its probable constituents, 200 ; no exact 

 evidence that an animal is enabled to 

 extract much more nutriment from 

 such food, ib. ; distinction between 

 concentrated food and manures, 201 ; 

 the atmospheric sui^ply overlooked, ib. ; 

 oil, sugar, &c., itneconomical, 202 ; oil- 

 cake a residuum, not purposely manu- 

 factured as such, ib. ; waste from re- 

 spiration, &c., constant, ib. ; manu- 

 factured food as sauce or medicine, 

 stimulating digestion, may aid a weak 

 or over excite a strong one, 203 ; trial 

 of etfects of manufactured and ordinary 

 food on pigs, ib. ; results unfavourable 

 to use of the condiment, ib. 



, soluble for stock (J. J. Eowley), 



xxi. 5-19 ; diagram of apparatus for its 

 preparation, 550. 



t of plants, on the, by Dr. George 



Fowues, prize essay, iv. 498. The 

 origin and composition of soils, ib. ; 

 origin of clay soils, 499 ; analysis of 

 the clay employed in the Sevres porce- 

 lain works, 500 ; calcareous soils, origin 

 of, ib. ; limestone soils, 501 ; sand, ib. ; 

 humus of soils, 502 ; the composition 

 of heat, 503 ; the sugar, starcli, gum, 

 and lignia, or woody tibre found in 

 plants, 504 ; malting barley, chemical 

 effect of, 505 ; dextrine, ib. ; vegetable 

 acids, 506 ; oily and resinous principles, 

 507 ; azotised principles, albuminous 

 matters, ib. ; the food of plants, 509 ; 

 the atmosphere, ib. ; the carbon of 

 plants, 510. 



. of plants, the experiments of Priest- 

 ley, iv. 510; of A. de CandoUe, 511 ; 

 of Dr. Gilly, ib. ; of T. de Saussure, 

 ib. ; water-plants, how light acts upon, 

 513 ; this action peculiar to tlie green 

 part of plants, ib. ; it ceases on the 

 withdrawal of liglit, ib. ; wetted saw- 

 dust placed in oxygen gas, effect of, 

 515. 



, Dr. Daubeny's experiments on the 



evolution of carbonic acid gas by plants, 

 iv. 515 ; supply of carbonic acid gas, 

 .quantity produced by animals, and by 

 the inhabitants of a town, 517 ; quantity 

 emitted by a volcano, 518 ; the amount 

 of carbonic acid gas in the atmosphere, 

 ib. ; hydrogen, how derived, ib. ; nitro- 

 gen of wild plants, how obtained, ib. ; 

 Boussingault's experiments rTi)on tlie 



origin of nitrogen in the plants of the 

 farm, 519 ; Liebig's opinion of its 

 origin, 520 ; the use of animal manures, 

 such as putrid urine, &c., 521 ; the pro- 

 portion of nitrogen in a soil in Alsace, 

 522 ; amoiuit of ammonia in rain-water, 

 ib. ; the mineral constituents of plants, 

 523 ; these not accidentally present in 

 ])lants, ib. ; siliceous matters in plants, 

 524 ; the newly enclosed lands of 

 America, ib. ; the effect of growing 

 tobacco exhausting the sod of saltpetre, 

 ib. 



Food, analysis of the ashes of wheat-straw, 

 iv. 525 ; of seed-wheat, 526 ; of straw 

 and wheat from Berkshu-e, ib ; manured 

 with farm manm'e, 527 ; ditto manured 

 with nitrate of soda, ib. 



, analysis of barley-sti'aw and grain 



grown in Battersea Fields, iv. 529. 



, analj'sis of rye-straw and grain, iv. 



529. 



, analysis of common oats, straw, and 



grain, iv. 530. 



, on the origin of the silica in plants, 



iv. 531. 



in lucern, iv. 532, 



-■ in white clover, iv. 532. 



in potatoes, iv. 532. 



in turnips, iv. 532. 



in Swedish turnips, iv. 534. 



the action of manures, iv. 535. 



of plants, the excreta of plants, the 



experiments of M. Macaire, iv. 536 ; 

 the tlieory he propounded, 537 ; analysis 

 of a.shes of farmyard horse-dung, see 

 " Horse-dung," 539 ; prevention of the 

 escape of ammonia from fermenting 

 dung, ib. ; the use of sulphuric acid for 

 this purpose, ib. ; two classes of manm'es, 

 540 ; ammoniacal liquor from gas- 

 works, 541 ; analysis of coal and coko 

 ashes, 541 ; bones, fish, guano, 542. 



of plants, analysis of guano by Voelc- 



ker, iv. 543. 



, nitrates of potash and soda, iv. 



544. 



, the proportion of gluten in floru' 



iniiuenced by manures, iv. 545 ; pro- 

 portion of flour and bran in seeds of 

 wheat, ib. ; coal contains nitrogen, 547 ; 

 the ammonia wasted in the sewage of 

 London, ib. ; on the analysis of soils, 

 ib. ; analysis of ashes of plants, 552 ; 

 on the determination of gluten in grain, 

 554. 



, how plants obtain their mineral 



food, by J. T. Way, xiii. 135 ; the sili- 

 ceous covering of wheat-straw, 137. 



, probably soluble, derived from weak 



solutions fVoelcker), xx. 152. 



