INDEX. 



419 



PAGE. 



Urea, a source of nitrogen in vegeta- 

 tion, 337 



Urea, origin of in the animal econo- 

 my, 335 



Varnish, new gold, 102 



Vaughan, Daniel, 190, 214 



Veneers, Embossed, 112 



Vermin, destruction of by anaesthetic 



agents, 

 Vessel, novel, 



Vibrations, influence of on metals, 

 Vibrations, on the optical study of, 

 Volcanoes, gaseous products of, 

 Voltaic 1'ile, theory of, 



Walls and ceilings, deadening. 

 Water, development of heat in, by 



agitation, 

 Water, metre, Jopling's improved, 



328 

 37 

 58 



247 



*V\~" 



OJt 



152 



84 



197 

 92 



PACT. 



Water-proofing of fabrics, &c., 99, .1UO 



Water, vibrations occasioned by fall- 

 ing, 250 



Waters of artesian wells, 344 



Wave principle, as applied to the 

 Great Eastern Steamer, 30, 31 



Whalebone, artificial, 105 



Wheat, preservation of, 111 



Wheat-flour and bread, composition 

 of, 



"W hirlwinds and Tornadoes, spirality 

 of motion in, 



Whistle, automatic-steam, 



Wind, on the direction of, 



Wines, chemistry of, 



WIXSLOW, Dr. 0. F. 



WIPE, Jon>,-, on thunder storms, 



Writing, Chemical, 

 Zodiacal Light, 



335 



260 

 48 

 260 

 312 

 36 

 " r )G 

 321-2 



402 



