464 



INDEX. 



a fundamental rule in the algorithm 

 of continued fractions, 29/ ; on a 

 theory of the conjugate relations of 

 two rational integral functions, com- 

 prising an application to the theory 

 of Sturm's functions, and that of 

 the greatest algebraical common 

 measure, 300 ; on a generalization 

 of the Lagrangian theorem of in- 

 terpolation, 374. 



Tar, on the origin of, in olefiant gas, 

 420. 



Tertiary beds of Hordwell, Hamp- 

 shire, on the, 1. 



Thermic conduction in metals, 382. 



Thomson (Prof. W.) on the mutual 

 attraction or repulsion between two 

 electrified spherical conductors, 

 114 ; on the thermal effects of 

 elastic fluids, 230. 



Time, on the methods of measuring 

 very small portions of, 313. 



Tin-stone pseudomorphs, on some, 

 121. 



Titanium, on the optical phenomena 

 and crystallization of, within mica, 

 amethyst and topaz, 265. 



Tourmaline, on the optical pheno- 

 mena and crystallization of, within 

 mica, amethyst and topaz, 265. 



Tourmalines, on the manufacture of 

 artificial, 346. 



Tyndall (Dr. J.) on the transmission 

 of heat through organic structures, 



121 ; on some of the eruptive phae- 

 nomena of Iceland, 150. 



Urea, on a new method for the deter- 

 mination of, 290. 



Urine, on the detection of quinine 

 and quinidine in, 1/1 ; on the fre- 

 quent occurrence of indigo in hu- 

 man, 226. 



Vegetation, experimental researches 

 on, 143. 



Viard (M.) on the electro-chemical 

 deportment of oxygen, 241. 



Ville (G.), experimental researches 

 on vegetation, 143. 



Waterspouts, on the theory of, 438. 



Welsh (J.) on some meteorological 

 observations in fourballoon ascents, 

 146. 



Wetherill (Dr. C. M.) on a red variety 

 of molybdate of lead from Phoenix- 

 ville, U.S. r 236. 



Wilkinson (T. T.) on mathematics 

 and mathematicians : the journals 

 of the late Reuben Burrow, 196. 



Williamson (Prof.) on the preparation 

 of propionic and caproic acids, 204 ; 

 remarks on the othvle theory of, 

 418. 



Wind instruments, on the theory of, 

 449. 



Wrightson (Dr. F.) on the atomic 

 weight and constitution of the al- 

 cohols, 88 ; on Prof. Williamson's 

 othyle theory, 418. 



END OF THE SIXTH VOLUME. 



PRINTED BY TAYLOR AND FRANCIS, 

 RED LION COURT, FLEET STREET. 



