621 



Thyroid body, function of the, 315. 



Titanium, bromide of, 42. 



Tomes (John) on the presence of fibrils 

 of soft tissue in the dentinal tubes, 63. 



Toronto, lunar-diurnal magnetic variation 

 at, 216. 



Train signalling, system of, 419. 



Transcendents, comparison of, with cer- 

 tain applications to the theory of defi- 

 nite integrals, 461. 



Tridacna, anatomy of, 589. 



Triethylamine, on a new mode of forming, 

 489. 



Trigonometry, parabolic, application of, 

 to the investigation of the properties of 

 the common catenary, 443. 



Tyndall ( J.), observations on glaciers, 331 . 



Urari, action of, on the animal economy, 

 201. 



Vision, anatomical and physiological ob- 

 servations on the organ of, 8, 229. 



Walker (C.V.), a system of train signalling, 

 &c., 419. 



Waller (Dr. A.), anatomical and physio- 

 logical observations on the organ of 

 vision, &c., Part I., 8. 



Waller (Dr. A.), experiments on the vagus 

 and spinal accessory nerves, 69. 



, experimental researches on the 



organ of vision, Part I., 229. 



Water, causes and phenomena of the re- 

 pulsion of* from the feathers of water- 

 fowl and the leaves of plants, 520. 



Welsh (John), account of the construc- 

 tion of a standard barometer, and of 

 the apparatus and processes employed 

 in the verification of barometers at the 

 Kew Observatory, 214. 



Williams (C. G.) on some of the products 

 of the distillation of boghead coal at 

 low temperatures, 119 ; Part I., 338. 



Williams (Dr. T.), researches on the re- 

 productive organs of the Annelids, 371. 



Wolf (R.), extract of a letter from, 

 416. 



Woods (Dr. T.) on the existence of mul- 

 tiple proportion in the quantities of 

 heat, or equivalent alteration of in- 

 ternal space of bodies, caused by defi- 

 nite changes of state as produced by 

 chemical combination or otherwise, 4, 

 211. 



Yorke (Colonel P.), researches on silica, 

 440. 



END OF THE EIGHTH VOLUME. 



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