VOLUMES ONE TO TWENTY-FIVE. 



120 



Nitrate of soda, experiments Avitli, by 

 "NV. Calvert (wheat and oats), i. 423 ; 

 by George Dewdney (on wheat, oats, 

 pastures, and onions), i. 425 ; by D. 

 Barclay (upon wlicat, sainfoin, clover- 

 seeds, tares, meadow and pasture, and 

 swede turnips), 42(3 ; by Urewitt and 

 Sou (corn crops and turnips), 424. 



■ as a top-dressing for wheat, by P. 



Pusey, xii. 202, 



and salt as a top-di-essing for wheat, 



by H. W. Keary, xiii. 200. 



■ , eflect of, in top-di-essing grass in 



Windsor Park, by F. H. Seymoui', xiii. 

 347. 



, on the source and supply of, and its 



use in small quantities as a restorative 

 to corn crops, by P. Pusey, xiii. 349 ; 

 its origin, 35.5. 



, adulterated with gj'psum (Pusey), 



xiii. 362. 



, mixed witli salt, used as a top- 

 dressing for wlieat in Norfolk, xiii. 304, 

 by II. W. Keary, 367 ; by T. Garnett, 

 368. 



, analysis of, xiii. 490. 



, experiments on wheat with, and 



with guano, soot, gypsum, and salt (Sir 

 J. Tylden), xiv. 15. 



used as a top-dressing for wheat in 



Surrey (Evershed), xiv. 98 ; and as the 

 only manm'e on a plot for fifteen years, 



, on the natural law by which cubic 



salt()etre acts as a manm-e, and on its 

 substitution for guano, by P. Pusey, 

 xiv. 374 ; effect of, on grass, 376 ; sub- 

 stances strengthen vegetation mainly 

 by their contents of nitrogen, xiv. 377. 



used for grass on a peat-bog f J. 



Nicol), XV. 1S5. 



, experiments on its use as a top- 

 dressing for wheat on the Holkliam 

 Park farm (J. Coleman, junior), xix. 

 303. 



, as a dressing for grass, less effectual 



than ammonia (Lawes and Gilbert), xix. 

 565. 



, its use for wheat (Voelcker), xx. 



391 ; composition of, ib. ; results of 

 renewed experiments, xxv. 239. 



, on foreign nitrates, by P. Pusey, xv. 



515 ; analysis of, by J. T. Way, 516. 



Nitric acid, its efiectongrass(P. Pusey), 

 xiv. 376. 



, amount of in di-ainage water (J. T, 



Way), xvii. 134. 



and ammonia, their equivalent of 



nitrogen (J. T. Way), xvii. 136. 



, in some proportion, univi-rsally pre- 

 sent in drainage water (J. T. Way), 

 VOLS. I. XXV. 



xvii. 138 ; generally in combination 

 with lime, magnesia, soda, or some 

 other base, 139 ; estimated loss result- 

 ing from this cause on Mr. Paino's land 

 at Farnham, 140 ; its quantity in rain- 

 water overestimated by M. Barral (,T. 

 T. Way), 145 ; the large quantity in 

 Mr. Paine's samples of water, from Farn- 

 ham, derived from manure, 147 ; not 

 from ammonia, but such materials as 

 the uric acid in guano, 148 ; tests for 

 nitric acid, see " Tests." 



Nitric acid, traces of, in farmyard 

 manure, xvii. 255 ; quantity of, in 

 rain-M-ater (Way), 618 ; its percent- 

 age in inverse ratio to the fall of rain, 

 620. 



in rain, not caused liy electrical ac- 

 tion (Way), xvii. 621. 



, process for estimating minute quan- 

 tities of (Way and Ville), xvii. 151 ; 

 apparatus eraj^loyed, illustration of, 153. 



Nitrification of the soil, on the (M. P. 

 Bortier), xxiii. 354 ; antiquity of marl- 

 ing and liming, ib. ; Bernard Palissy on 

 calcareous manm-es, ?7j. ; opinions of mo- 

 dern cliemists, ih. ; Piertsch on circum- 

 stances favoiu'able to nitrificatioii, //*. ; 

 views of Boussingault, Barral. and 

 others, 355 ; the practice of artificial 

 nitrification at Britannia farm, near 

 Ostend, ib. ; M. Venvinkeroge's experi- 

 ments at Has.selt, 357. 



Nitrogen, connexion between, and the 

 nutrition of food (Danbeney), ii. 254. 



, the quantity of nitrogen in the seed 



varies according to the quantity of 

 nitrogen contained in the manure of 

 the soil (Hannani), iv. 179 ; Heruib- 

 staedt's trials with wlieat, .see" Wlieat." 



, how obtained by plants iroin the 



atmosphere and from animal manures 

 (Fownes), iv. 518. See " Food of 

 plants." 



is tiie element mainly required as 



manure on ordhiary soils by our corn- 

 crops (P. Pusey), xiii. 358. 



, amount of, in cubic and salt petres, 



and in guano (Pusey), xiii. 360. 



• , chemical properties of, xiii. 425. 



, origin of, in plants (P. Pusey), xiv. 



377 ; by A. Voelcker, 382. 



, the atmospliere as a soiu'ce of, to 



plants, by J. T. Way, xvi. 249; M. 

 Saussure's researches, 252 ; Liebigs, 

 253; Boussiugault's, i7>., 259; Grager's, 

 254 ; Kemp's, ib. ; Fresenius's, il). ; De 

 Ville's, 255 ; Barral's, 258 ; Lawes and 

 Gilbert's, 261. 



, proportion of, in crops (Anderson), 



xvii. 446. 



