552 



INDEX. 



Tem))eratuies, on a new mode of 

 measuring high, 157 ; on the re- 

 duction of, by an clectiic current, 

 224, 3S0, 419: 



Tliermometers, on the construction of 

 standard, 30fi. 



Thomson (Prof. W.) on the dynamical 

 theoiT of heat, 8, 105, 168, 424 ; 

 on the mechanical action of radiant 

 heat or light, 256 ; on the power 

 of animated creatures over matter, 

 258 ; on the soiuces ayailable to man 

 for the production of mechanical 

 effect, 25!) ; on a imiversal tendency 

 in nature to the dissipation of me- 

 chanical energy, 304 ; on the ther- 

 mal effects experienced by air in 

 rushing through small apertures, 

 481. 



Tide, lunai- atmospheric, at Singapore, 

 remarks on the, 14". 



Tides of the North Sea or German 

 Ocean, researches on the, 466. 



Tin, new method of precipitating oxide 

 of, 476. 



Tin-ore, on a remarkable deposit of, 

 538. 



Tomes (J.) on the structiu-e and de- 

 velopment of bone, 467. 



TMidall (Dr. J.) on the progress of 

 the physical sciences, 241 ; on the 

 absoqition of heat by a bismuth 

 and antimony joint, 318 ; on the 

 reduction of temperatures by elec- 

 tricity, 419. 



Victoria regia, on the structiu-e of the 

 stem of, 151. 



Voltaic electricity, on the conducting 

 powers of wires for, 120. 



Voltaic pile, new arrangement of the, 

 77 ; on the mechanical action of 

 the, 546. 



Wallace (W.) on the chloride of 

 arsenic, 361. 



Wells (D. A.) on the existence of or- 

 ganic matter in stalactites and sta- 

 lagmites, 155. 



Welsh (J.) on the general process 

 adopted in graduating and com- 

 paring the standard meteorological 

 instruments for the Kew Observa- 

 toiy, 306. 



Wiedemann (M.) on the motion of 

 fluids from the positive to the ne- 

 gative pole of the closed galvanic 

 circuit, 546. 



Wilkinson (T. T.), additions to the 

 late Mr. Davies's notes on geo- 

 metry and geometers, 28, 201. 



WiUiams (Dr. T.) on the blood-proper 

 and chylo-aqueous fluid of inverte- 

 brate animals, 148. 



Wilson (J.) on a new mode of mea- 

 suring high temperatures, 157. 



\^''ood, fossil, occurrence of metallic 

 iron in, 333. 



Woodhead's (G.) Atmosphere : a Phi- 

 losophical Work, reviewed, 228. 



Woods (Dr. T.) on chemical combina- 

 tion, and on the amount of heat 

 produced by the combination of 

 several metals with oxygen, 370. 



Wootz, on the composition of, 42. 



END OF THE FOURTH VOLUME. 



PRTXTED BY TAYLOR AND FRANCIS, 

 RED I.IGN COURT, FLEET STREET. 



