568 



I N D E X 



Temperament, or the division of the 

 octave, on, 164. 



Thermographs of the isothermal lines 

 of the solar disk, on a method of 

 obtaining, 159. 



Thomson (SirW.)on Laplace's theory 

 of the tides, 227, 279, 388. 



Thorpe (T. E.) on the specific vo- 

 lumes of liquids, 554. 



Tides, on Laplace's theory of the, 227, 

 277, 279, 388, 544. 



Toluol, on nitrated, 17- 



Tomlinson (C.) on some pheno- 

 mena connected with the boiling 

 of liquids, 85. 



Tribe (A.) on the augmentation of the 

 chemical activity of aluminium, 

 284 ; on the action of the copper- 

 zinc couple, 285. 



Tyndall (J.) on acoustic reversibility, 

 146 ; on musical consonance, 

 336. 



Unitation, on, 117, 521. 



Vermiculites, on two new varieties of, 

 135. 



Volcanic cones, on an apparatus to 

 illustrate the formation of, 52. 



heat and energy, on, 1, 302. 



rocks, on the microscopic struc- 

 ture of some ancient and modern, 

 327. 



Walenn (W. H.) on unitation, 117, 

 521. 



Warburg (E.) on friction and heat- 

 conduction in rarefied gases, 53. 



Ward (J. C.) on the comparative mi- 

 croscopic structure of some ancient 

 and modern volcanic rocks, 327. 



Watts (Dr. W. M.) on a new form of 

 micrometer for use in spectroscopic 

 analysis, 81. 



Waves, on stationary liquid, 290, 377- 



Weston (W.) on the application of 

 phosphorus to the "poling" of 

 copper, 542. 



Woodward (J. C.) on an apparatus to 

 illustrate the formation of volcanic 

 cones, 52. 



Zinc, on artificially crystallized oxide 

 of, 414. 



END OF THE FIFTIETH VOLUME. 



PRINTED BY TAYLOR AND FRANCIS, 

 RED LION COURT, FLEET STREET, 



