VOLUMES ONE TO TWENTY-FIVE. 



AGRICL'LTVRAL. 



to the mineral theory of Baron Liebig, 

 xii. 1 ; on the continuous growth of 

 Avheat on the same soil, 6 ; produce of, 

 manured with mineral substances only, 

 and with salts of annuonia only, 10 ; 

 trials with Liebig's wheat mauiu'e, 12 ; 

 trials with rice, salts of ammonia, &c., 

 as manures for wheat, li; trials with 

 various salts of ammonia, superphos- 

 phate of lime, and other salts, 16; 

 general effect of mineral maum-es on 

 the growth of wheat, 26 ; faii-y rings, 

 33 ; effect of superphosphate of lime ou 

 turnips, ib. (J. B. Lawes.) 



Agricultural chemistry, on the compara- 

 tive feeding qualities of different breeds 

 of sheep, by J. B. Lawes, xii. Hi, xiii. 

 178, xvi. 45. 



chemistiy, on pig-feeding, by J. B. 



Lawes, xvi. 45. 



chemistry, on some points connected 



with, by J. B. Lawes and Dr. J. H. 

 Gilbert, xvi. 411 ; accuracy and relia- 

 bility of then- experiments (J. E. Deui- 

 son;, xvii. 55 ; services of Baron Liebig, 

 xvi. 411 ; remarks on his conclusions, 

 414 ; quotations from his works, 419 ; 

 quotations from the works of various 

 foreign chemists ou the theories of 

 Liebig, 426. 



chemistry, on (Liebig), xvii. 284; 



amount of nitrogen in legmniuous and 

 other crops, ib. ; also in soils of Prussia, 

 Bavaria, Russia, and Cuba, 285 ; ana- 

 lyses, 286; absorbing power of soils, 

 287 ; does the natural supply of nitro- 

 gen suffice for a full wheat croiJ? 288; 

 waste in London sewage, ib. ; constant 

 increase of English fertility, 289 ; sup- 

 ply of nitrogen from coals burnt, ib. ; 

 can the addition of ammonia perma- 

 nently ineiease fertility ? ib. ; the 

 author's ' Chemistry of Agriculture ' 

 not intended as a jiractical manual, 

 290 ; ou the older humus theory, 291 ; 

 the author's view, ib. ; increase of or- 

 ganic life unlimited, ib. ; mineral sub- 

 stances in the soil and air, 292 ; cause 



'. of unequal fertility, 293 ; effect of arti- 

 ficial supplies of ammonia, 294 ; they 

 economise time, but hasten exhaustion, 

 295 ; influence of di-ainage and tillage, 

 297 ; substances other than nitrogen 

 supplied in ammoniacal salts, 298 ; 

 Kuhlmann's experiments, ib. ; why 



' four-fifths of annuoniacal salts not re- 

 covered in crops, 300 ; excess of nitro- 

 gen in crop over tliat of the guano 

 used, 301 ; the acid in ammoniacal 

 salts dissolves j^hosphates (301) and 

 silicates, 302 ; but where they are ap- 



AGRICVLTrEAL. 



plied the produce is less in future years, 

 303 ; and in time becomes nil, 304 ; 

 wheat and grass follow the same law, 

 305 ; Schaltcrmann's experiments with 

 salts of ammonia, ib. ; such salts only 

 serviceable when all the mineral con- 

 stituents are in excess, 306 ; the author 

 complains of mistranslation, 307, and 

 misquotation by Mr. Lawes, 308 ; his 

 opinion on ammonia as recorded in his 

 ' Dictionary of Chemistry,' 309 ; in- 

 terests of landlord and farmer con- 

 trasted, 311 ; hardwood ashes a good 

 supplement to phosphates and ammo- 

 nia, 312 ; action of farmyard manure, 

 313 ; vindication of the author's manure 

 and pamphlets, 314 ; meanings of the 

 word "organic" as used by Liebig 

 and by Lawes, 316 ; substitution of 

 "gaseous" suggested (W. Gregoiy), 

 ib. ; Mr. Lawes' trial of Liebig's ma- 

 nure reviewed, 318 ; his mixtures, 319 ; 

 the art of farming consists in utilising 

 the supply of i^lant food in the air, 

 321 ; the hyijothesis of the waste of 

 ammonia, 322, does not account for 

 like action in phosjihatcs, ib. ; effect of 

 burnt clay and ashes attributed by 

 Lawes to tillage, 324 ; examination of 

 springs and water meadows by Chevau- 

 dier and Salvetat, ib.; study of Lord 

 Bacon's works, 325. 



Agricultural chemistry, Liebig's paper 

 xvii. 284) criticised liy J. B. Lawes, xviii. 

 513 ; his conclusions for ripened cereals 

 based on results of grass cut green, 519. 



chemistry, papers on, by Mr. J. B. 



Lawes and Dr. Gilbert. See " Lawes " 

 and " Lawes and Gilbert." 



College, the Royal, report of a com- 

 mittee appointed by, on the reaping 

 machines shown at Lewes, xiii. 332. 



implements, see " Implements." 



Institutions for the advancement 



of Agricultural Science, on, by Dr. C. 

 Daubeny, iii. 364 ; in foreign countries, 

 ib. ; on those of Grignon, near Paris, 

 365 ; of Germany, 370 ; at Mogelin in 

 Brandcnbm-gh, ib. ; at Hohenheim in 

 Wirtemberg, 372 ; at Schlerssheim, near 

 Munich, 373 ; at Keszthely, in Hungary, 

 374 ; near Pavia, ib. ; near Florence, 

 ib. ; in Ireland, ib. ; the model farm of 

 Royal Agricultm-al Society of Ireland, 

 375. 



Institutions, Lord Ducie's model 



farm, ib. 376. 



Institutions, Mrs. D. Gilbert's Agri- 



cidtural Schools, ib. 377. 



Institutions, Royal Academy of 



Agriculture of Sweden, iv. 199. 



