S9H 



INDEX. 



Steam highly elastic, on the economy of 



using it expansively, 170 

 Steam boilers, on their explosion, I6G 

 Steam-engine, account of Dr Birkbeck's 

 work on it, 181 — notice of Mr Per- 

 kins, 359 



Steel, new process for making it, 3GI 



Stereometer, description of one, 143 



Sternbergite, a new mineral described, 

 242 



Sulphatc-tri-carbonate of lead, on some 

 new observations on it, by Mr Brooke, 

 145 



Telescopes with fluid object-glasses, by Pro- 

 fessor Barlow and Mr Blair, 335, 336 



Thermometer, on a delicate and differen- 

 tial one, 350 



Thomson, Dr Thomas, on the atomic 

 weight of nickel, 155 — on a new com- 

 bustible gas, 182 — on the peroxide of 

 gold, 182 



Toads, on those found alive under 

 ground, 358 



Turner, Dr, his analysis of oxahverite, 



118 — on tests for arsenic, 379 

 Univalve shells, on the cause of the spir^ 



turn in them, 121 

 Vauquelinite, on a French locality of, 



213 

 Vegetables, on the growth of, on animals, 



30 

 Ventr%8s, Alexander, Esq. on a new stere- 

 ometer, 143 

 Vesuvius, remarks on, 11 — barometrical 



measurements of, (58 

 Vibrations, on normal ones, 379 

 Volcanoes of Auvergne, 362 

 Volcanic appearances in the Himalaya 



Mountains, 55 

 Warden, Mr W. on a new safety gas 



burner, 125 

 Water, pure supplied by a plant, 384 

 Westphal, M., on variable stars, 184 

 Wilcox, Lieutenant, on the north-east of 



Assam, 63 

 Yarrell on the plumage of hen pheasants, 

 354 



DESCRIPTION O 



ATES IN VOL. VII. 



cc*^ 



i/ 



PLATE I. Fig. 1. Fruit of the Garcinia Pedtmculata^ p. 45. 



Fig. 2. Mr King's new Safety Tube, p. 63. 



Figs. 3, 4, 5, 6, Halos and Parhelia seen in America, p. 113. 



Figs. 7, 8, Mr Warden's Safety Gas Burner, p. 125. 



Figs. 9, 10, Diagrams to explain the economy of using Steam ex- 

 pansively, p. 170. 



Figs. 11, 12, Hunter's Travelling Railway, p. 173. 

 PLATE II. Figs. 1, 2, Mr Ventress's Improved Stereometer, p. 143. 



Fig. 3. Twin Crystals of Phillipsite, p. 141. 



Fig. 4. Oxahverite, p. 115. 



Fig. 5. Lerncea Elongata, p. 147. 



Figs. 6, 7, Eggs of the Pontobdella muricata, p. 160. 

 PLATE in. Contains Drawings of several new Mineral Species. 



Figs. 1, 2, 3, Sternbergite, p. 242. 



Fig. 4, Polyhalite, p. 240. 



Fig. 5, Davyne, p. 326. 



Fig. 6, Vauquelinite, p. 213. 



FMg. 7 — 11, Arseniate and Phosphates of Soda, p. 314. 



Fig. 12, Bismuthic Blende, p. 342. 

 PLATE IV. Chart of the Isodynamic lines for the whole magnetic intensity, by 

 Professor Hanstecn, p. 351. 



/If" 



EDINBURGH : 

 PniNTED BY JOHN STARK. 



