606 



INDEX. 



Thomson (T. S.) on the artificial magne- 

 tic oxide of iron, 340. 



Thulite, analysis of, 442. 



Tides in the river Thames, on the laws of 

 the rise and fall of the, 163. 



Tin, on the compounds of the bichloride 

 of, with the alkaline chlorides, 33. 



Trimmer (J.) on Cucullaa decitssata, 328. 



Trommer (M.), method of detecting gum, 

 dextrin, grape-sugar, and cane-sugar, 

 224. 



Undulatory theory, on the application of, 

 to the explanation of dispersion, 373. 



Varrentrapp and Will(Drs.), new method 

 of determining nitrogen in organic com- 

 pounds, 216; on the composition of 

 Haiiyne, 445. 



Volckel (M.) on the oil of caraway, 38. 



Voltaic arrangements, use of chromic acid 

 in, 393 ; process for etching Daguerreo- 

 type plates, 18; battery, observations 

 on the constant, 294. 



V. R. on the magnetic influence of the 

 lunar spectrum, 39. 



Wackenroder (M.) on citric acid, 33. 



Walter (M.) on cedar oil, 38. 



Warington (R.) on reducing the indica- 

 tions of the saccharometer and hydro- 

 meter to each other, 342 ; on the pre- 

 paration of chromic acid, 343 ; on chro- 

 mic acid as an agent in voltaic arrange- 

 ments, 395 ; on are-arrangement of the 

 molecules of a body after solidification, 

 537. 



Will and Varrentrapp's new method of 

 determining nitrogen in organic com- 

 pounds, 216. 



Williams (Rev. D.) on the Devonian sy- 

 stem, 1 17. 



Woehler (Prof.) on euchroic acid, 169. 



Wolfram, on the composition of, 73, 312. 



Wrede (Baron von) on the velocity of 

 propagation of radiant heat, 379. 



Yelloly (Dr.), notice of the late, 547. 



EXD OF THE TWEXTIKTH VOLUME. 



^:^^J.^L'^ 



Printed by RiclLird and John E.Taylor, Red Lion ronit, Fleet Street. 



