517 



Polyommatus Artaxerxcs, 349. 



I'olyzoa, on the true signification of 

 certain reproductive phenomena in, 

 604. 



Ponton (Mungo), on Solar Light, with 

 a description of a simple Photo- 

 meter, 355. 



Pottery, analyses of, 505. 



Power of animated Creatures over 

 Matter, 110. 



Prisoners, experiments on the diet of, 

 180. 



Probabilities, on the summation of a 

 compound series, and its applica- 

 tion to a problem in Probabilities, 

 173. 



application of the theory of 



Probabilities to the question of the 

 combination of testimonies, 435. 



on combining two or more, so 



as to form one definite probability, 

 366. 



Property of Numbers, 390. 



Pumice, occurrence of, in Tyree, 

 120. 



Pyromeconic Acid, on some salts and 

 products of decomposition of, 117. 



Quartz in Mica, 159. 



Races of the Western Coast of Africa, 

 429. 



Radiant Heat or Light, mechanical 

 action of, 108. 



Rankine, (W. J. Macquorn, C.E.), on 

 the Vibrations of plane-polarised 

 light, 3. 



on the mechanical action of 



Heat, 5, 162, 223, 287. 



• on the Compressibility of 



Water, 58. 



on the economy of Single Act- 

 ting Expansive Steam Engines, 

 and Expansive Machines generally, 

 60. 



on the contrifugal theory of 



Elasticity, and its connection with 

 the theory of Heat, 86. 



on the computation of the 



specific heat of Liquid Water at 

 various temperatures, from the ex- 

 periments of M. Regnault, 90. 



on the absolute zero of the 



Perfect Gas Thermometer, 160. 

 Red, invisibility of, to colour-blind 



eyes, 226. 

 Red Prominences observed during a 



total solar Eclipse, 79, 135, 136. 

 Reproductive economy of Moths and 



I?ccs, 454. 



Reproductive phenomena in the Poly- 



zoa, 504. 

 Richardson (Sir John), C.15. Memoir 



of Rear-Admiral Sir John Frank- 

 lin, 347. 

 Ring of Saturn, 80. 

 Roche Moutonnte, on the summit of 



the range of hills separating Loch 



Fine and Loch Awe, 459. 

 Rocks, structural character of, 197. 

 Rogers (Prof. H. D.) on the Laws of 



Structure of the more disturbed 



zones of the Earth's Crust, 387. 

 Rogers (Prof. W'illiam B.), on certain 



cases of Binocular Vision, 356. 

 Romaic Ballads, on, 227. 

 Rottlera tinctoria, colouring matter 



of, 296. 

 Rowney (Dr T. II.) on a new source 



of Capric Acid, with remarks on 



some of its salts, 45. 

 ■ Researches on the Amides of 



the Fatty Acids, 305. 

 Russell (Dr J. Rutherford) on the 



poison of the Cobra da Capello, 44. 



Salisbury Crags, Glacial phenomena 



of, 497. 

 Salmo umbla, observations on, 125. 

 Salmonidae, observations on, 267. 

 on impregnation of the ova 



of, 219. 



Ovum and young fish of, 428. 



Samian Ware, analysis of, 506. 



Sang (Edward). On an Inaccuracy 



(having its greatest value about 1'') 



in the usual method of computing 



the Moon's ParaUax, 292. 



on the Accuracy attainable 



by means of multiplied observa- 

 tions, 319. 



Geometry, a science purely ex- 

 perimental, 341. 



on the Turkish Weights and 



Measures, 349. 



Short verbal notice of a simple 



and direct method of computing the 

 Logarithm of a Number, 451. 



Theory of the Free Vibration 



of a Linear Series of Elastic Bodies, 

 358, 360, 507. 



Saturn, on lithograph of, 80. 



Saturn's Ring, notice of recent mea- 

 surements of, 192. 



Scolezite, 124. 



Scott (Dr A. J.) on the analysis of 

 some Scottish Minerals, 122. 



Scottish Minerals, analysis of, 122. 



Secular (Dr). Notice of the occur- 

 rence of British Newer Pliocene 



