616 



INDEX. 



Stars, lixed, present state of our know- 

 ledge of tlie parallax of the, 597. 



Steam, considered as a conductor of elec- 

 tricity, 11; on the electricity of effluent, 

 50, 93, 95, 100, 32S. 



Steneosaurus, 552. 



Stenhouse (J.) on a new compound of 

 chlorine and cyanogen, 29; on artificial 

 oil of ants, 122 ; on the oils of elemi and 

 olibannm, 184 ; on palm oil, and cacao 

 butter, 186. 



Storms, papers relating to the law of, 17, 

 20 ; correction of an error in Prof. 

 Dove's letter on the law of, 514 ; notice 

 by Prof. Dove respecting the error, 

 608. 



Strickland's (H. E.) series of coloured sec- 

 tions of the cuttings on the Birmingham 

 and Gloucester railway, 523. 



Strontian, oenanthylate of, 421. 



Suberic acid, 116, 422. 



Sulphurets, metallic, new mode of analysis 

 of, 211. 



Sulphuric acid, on the combination of, 

 with nitric oxide, 81 ; action of, on al- 

 cohol, 276. 



Sylvester (Prof) on a new and more ge- 

 neral theory of multiple roots, 137, 249; 

 on a linear method of eliminating be- 

 tween double, treble, and other systems 

 of algebraic equations, 423. 



Ternary systems of algebraic equations, 

 427. 



Thomas's (R.) remarks on Prof. Whewell's 

 paper on the mean level of the sea, 183. 



Tilley (T. G.) on some of the products of 

 the action of nitric acid on castor oil, 

 417. 



Tin ore, occurrence of, in Ireland, 134. 



Torpedo, on the, 552. 



Tovey (Mr.) on the application of Huy- 

 ghens's principle in physical optics, 

 Mr. R. Potter's reply to, 11. 



Trees, fossil, characters of some, 212. 



Undulations, theory of, on certain points 

 in the, 161, 270. 



Urea, state of, in urine, 545. 



Urine, state of urea in, 545. 



Vegetables, living, power of attraction of, 

 520. 



Venus, orbit of, investigation for the cor- 

 rection of the elements of the, 601. 



Veratric aether, 441. 



Vigors (N. A.), notice of the late, 66. 



Vliet (M. van der) on the resins of ben- 

 zoin, 439. 



Voelckel (M.) on the oils of cascarilla and 

 caraway, 281. 



Walker (C. V.) on electrotype manipula- 

 tion, and on the construction of a con- 

 stant acid battery, 520. 



Walter (M. P.) on the action of anhydrous 

 phosphoric acid on camphoric acid, 

 238 ; on the action of anhydrous sul- 

 phuric acid on anhydrous camphoric 

 acid, 441. 



Walton (Rev. W.), meteorological journal 

 for 1840, at Allenheads, 556. 



Wax, fossil, from Gallicia, analysis of, 235. 



Weaver (T.) on the composition of chalk 

 rocks and chalk marls by invisible or- 

 ganic bodies, 375, 443 ; on M. Alcide 

 d'Orbigny's view of the white chalk of 

 the Paris basin, 456. 



Weddle (T.) on a new method of solving 

 numerical equations, 559. 



Wedgewood (H.) on the natural arrange- 

 ment of consonantal sounds, 363. 



Wheatstone (Prof) on the electro-mag- 

 netic clock, 139. 



Will (Dr. H.) on the composition of che- 

 lidonin and Jervin, 32 ; on the oil ob- 

 tained from Ruta graveolcns, 207 ; on 

 veratric aether, 441. 



Williams (Rev. D.) on a mass of trap in 

 the mountain limestone on the western 

 extremity of Bleadon hill, 522. 



Williams (J.) on the electricity of steam, 

 93. 



Williamson (W. C.) on some geological 

 specimens from Syria, 233. 



AVind, on the direction of the, in the storm 

 of Dec. 15th, KS39, 17. 



Woehler (Prof) on hydrotelluric aether, 

 78 ; on the preparation of formic aether, 

 209; on telluretof aethyl, 210. 



Xanthophyllite, analysis of, 122. 



Yttria, phosphate of, 519. 



Zautedeschi (Prof) on electric currents in 

 warm-blooded animals, 271. 



END OF THE EIGHTEENTH VOLUME. 



Printed by Richard and 





'Court, Fleet Street. 



