INDEX. 



Tozzettl <ii Targioni, 285 



Transit instrument, method of adjust- 

 ing in a plane of the meridian, 291 



Trimnel, Mr. 373 



Troil, Von, his report of the use of 

 lichen among the Icelanders, 210 



Troughtons, Messrs. their ten-inch sex- 

 tant, 25— (See 203) 



Turnips, comparative culture of, 14 



Turquoise stone, analysis of, 186 

 V. 



Vanishing lines in perspective, see Per- 

 spective 



Vauquelin, M. on iron as a colouring 

 matter, 189-- -^On menacane, &c. 

 129, 139 



Vegetable fibres, the growth of the East 

 Indies, experiments to ascertain the 

 comparative strength of, 223 



Vegetable inflammable gas, 241 



Vessels of trees, 60 



Volta's contact of metals, 79 



Von Buch, see Buch 



Von Humboldt, see Humboldt 



Von Troil, see Troil 

 U. 



Universal correspondence, see Corres- 

 pondence 



Urine, experiments and observations on 

 335 



W. 



Walker, Mr. 119, 160 



Water in the atmosphere, state of, 4 — 

 Not deprived of its oxygen by boiling, 

 75 



Water heated by the galvanic process, 

 during decomposition, 81 



Water pits, see Piti 



Watson, Mr. W. on the comparative 

 culture of turnips, 14 



Weather, observations and inferences to 

 ascertain the changes of, from a pre- 

 vious alteration in the marine barome- 

 ter, 109, 173 



Webster, Mr. letter from, communicat- 

 ing an account of the discovei"y of the 

 means of illuminating by gas from 

 coal, by Dr. Clayton previous to the 

 year 1664, 83 



Werner's ' Method of Mineralogy,' 129 



Wet introduced into rooms through n- 

 terstices of windows, method of pre- 

 venting, 156 



Whales found near the Shetland Isle*. 

 310 



Wheel, improved for regulating machi- 

 nery, 126 



Wlyston, Mr. on the variation of the 

 compass, 303 



Whytt's controversy with Haller on the- 

 origin and nature of irritability, 347 



Winds, land and sea, indicated by the 

 marine barometer, 108 — Curious ob- 

 servations on, 171 



Winsor, Mr. projector of the Light and 

 Heat Company, 73 — His claims to 

 public encouragement discussed, 74, 

 83, 308 



Withering's botanical arrangement, 372 



W. N. on Mr. Winsor's proposed Light 



. and Heat Company, and his claims to 



originality of invention of gas lights, 



73, 308— On Mr. Hardy's improved 



balance for time keepars, I2ii — On 



blacking for leather, 238 On the 



method of discharging grease spots 

 from silk and woollen cloths, 318 — To 

 correspondents, 320 



Woodhouse, Professor, S91 



X.'s explanation of the exhibition call- 

 ed the " Invisible Girl," 69 — Queij 

 respecting, 119 



Zach, M. de, 259 



Zinc, its use in gilding, 15* 



END OF THE SIXTEENTH VOLUMES 



PrintedbyW. Stratford, Crown-Court, Temple- Bar. 



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