INDEX. 



and ammonia, 243, et seq. — On the 



decomposition and recomposition of 



boracic acid, 260 

 Thermometer for the pocket, 234 

 Thomson, Mr. on the analysis of the 



sulphate of barytes, &c. 174, 280 

 Threshing machine for hemp and flax, 



16 

 Towashend, Rev. Joseph, on the food 



of plants, 5 

 Transit observations, method of taking, 



139 

 Trees, stem of, 334 

 Tuke, Mr. his mode of paring and 



burning lands, 191 

 Turquoise, oriental, analysis of, 158 



V. 



Van Mons, see Mons. 



Van Uslar on the oxigen of plants, 9 



Vavasour, Colonel, on paring and 

 burning soils, 195 



Vauquelin, M. on the reciprocal action 

 of charcoal and hidrogen, 71— On ca- 

 laguala root, 141 — On the chemical 

 nature of the smut in wheat, 146— 

 His theory of the formation of ether, 

 201 — On a concrete sugar found on 

 the rose bay, 283 



Vegetables, improved culture of, 51— 

 Growth of, 315 



Vesta, observations of, 317 — Elements 

 of her orbit, 318 



Vogel, M. 155 



Volkmann on fossils, 35 



Vraic used as manure, 72 



Voyage of discovery, 235 



W. 



WagstafFe, Mr. on reclaiming waste 

 [ands, 95 



Walford, T. Esq. on an insect that 

 destroys the wheat, supposed to be 

 the wireworm, 102 



Walker, Mr. E. on taking transit ob- 

 servations, 139 



Walker, Mr. P 157 



Wallace's " History of Orkney," 84 



Walsh, Mr. his description of the fossil 



alcoynia, 47 

 Waste lands, reclaimed, 95 — Improved, 



98 

 Water, a vehicle for the food of plants, 8 



—Origin of the carbon or pabulum of 



plants, 72 

 Wedge, Mr. his experiment on paring 



and burning land, 191 

 Wernerian Society, 156 

 Wheat, diseases of, 146 

 Wilkes, Mr. his method of paring and 



burning' land, 190 

 Wilkinson, Dr. on paring and burning 



193 

 Williams, J. Esq. his method of hasten- 

 ing the maturation of grapes, 116 

 Wine, acid, sweetened by charcoal, 



335 

 Wings, artificial, 319 

 Winter leaf bud, its formation, 293 

 Wireworm, observations on the, 102 

 Withering on the sulphate of barytes, 



174 

 W.N. on the method of taking transit 



observations, 14C — On the luminous 



smoke from lead smelting houses, 233 



—On the camera lucida, 577 

 Woollen rags, useful for manure, 12 

 Wright, Mr. on the beneficial effects of 



paring and burning land, 195 



Yalden, Mr. 158 , 



Yorker, Mr. J. 60 



Young, Arthur, Esq. certificate from, 

 on Mr. Curwen's improvements in 

 agriculture, 61— On manures, 120, 

 187, 284 



Young, Dr. T. his numerical table of 

 elective attractions j with remarks ou 

 the sequences of double decomp o«- 

 tion, 354 



END OF THE TWENTY-THIRD VOLUME. 



