552 



INDEX. 



Titaniferous iron-sand, observations 

 on, and analysis of, 136. 



Todhunter (I.) on a problem in the 

 calculus of variations, 199. 



Tuning-forks, on the tones produced 

 by rotating, 534. 



Tyndall (Prof.) on the vibration of 

 strings, 68 ; on the influence of the 

 absorption of heat on the forma- 

 tion of dew, 118; on radiation and 

 absorption, 292. 



Uranium compounds, flame-reactions 

 of, 104. 



Vanadium, on some reactions of, 103. 



Vanishing fractions, on the evaluation 

 of, 121. 



Vapour, on the spectrum of aqueous, 

 315. 



densities, on abnormal, 387. 



Walker (It.) on ancient shell-mounds 

 at St. Andrews, 321. 



Wanklyn (Prof. J. A.)'on limited oxi- 

 dation, 540. 



"Water, on the freezing of, at tempe- 

 ratures lower than 32° F., 422. 



Wild (H.) on the absorption of ra- 

 diant heat by dry and moist air, 

 241. 



Wilde (H.), experimental researches in 

 magnetism and electricity by, 148. 



Wind-charts, on the conversion of, 

 into passage-charts, 345. 



Wurtz (M.) on chloride of thionyle, 

 386. 



WyroubofF (M.) on the colouring- 

 matter of some fluorides, 385. 



Young (Prof. J. R.) on the evalua- 

 tion of vanishing fractions, and on 

 Newton's rule, 121. 



Zeolites, on the chemical composition 

 of some, 223. 



Zinc, on some reactions of, 95. 



END OF THE THIRTY-SECOND VOLUME. 



PRINTED BY TAYLOR AND FRANCIS, 

 RED LION COURT, FLEET STREET. 



PEE. 13 



