INDEX. 



541 



<;Jompass errors, experiments towards 

 the construction of new forms of 

 instruments for the correction of,51 . 



Conductors, electrified spherical, on 

 the mutual attraction or repulsion 

 between two, 287- 



Copper, on the separation of, from 

 zinc, 230. 



Copper smelting, description of, 30, 



. 175, 345, 486. 



Crystals, on the optical figures pro- 

 duced by the disintegrated surfaces 

 of, 16. 



Davy (E. W.) on a new test for ni- 

 tric acid and the nitrates, 330. 



Denham (Capt. H. M.) on a deep- 

 sea sounding in 7706 fathoms, 214. 



Denison (Mr.) on clock escapements, 

 462. 



Deville (H.) on the temperature pro- 



- ; duced by the combustion of carbon 

 'm the air, 387. 



Dick (A.), analysis of some supposed 

 crystals of trona, 373. 



Ear, human, on the functions of the 

 "Eustachian tube in the, 55. 



Earth, on the mean density of the, 153. 



Eclipses of Agathocles, Thales and 

 Xerxes, observations on the, 216. 



Electric currents, on the temperatures 

 , of conductors of, 46, 147, 193; on 

 the intensity and quantity of, 363 ; 

 ;pn transient, 393. 



Electric light, experiments on the, 

 15, 468. 



Electrical decomposition, on some 

 anomalous cases of, 203. 



-rr— machines, on inductive, 537. 



Electricity, on the conductibility of 

 'minerals for voltaic, 12; on the 

 development of, during secretion, 

 59 ; on the signs of current, mani- 

 fested during vegetation, 135. 



Elhpses, relation of, to cardioids, 136. 



Encke (M.) on a new method of com- 

 puting the perturbations of planets, 

 J40. 



^grayings, on the reproduction of, 

 iby mieahs o^ the vapour of iodine, 



iEqnations,' oti'a method of transform- 

 ing, by means of symmetric func- 

 ' tions, 354, 493. 



Equivalent volumes, remarks on, 526. 



Erythrozym, on the preparation and 

 properties of, 504. 



JEthnology, on the subjectivity of 

 certain classes in, 326. 



Euclase, analysis of, 127. 

 Eustachian tube, on the muscles 



which open the, 378. 

 Faraday (Prof.) on the magnetic 



force, 218. 

 Fizeau (M.) on inductive electrical 



machines, 537. ';,,, 



Fluids, on the specific heat of elasticSi^ 



473. 'f-^^ 



Frankland (Dr. E.) on a new series 



of organic bodies, 60, 159, 239. 

 Fresenius (R.) on the presence of bo- 



racic acid in mineral waters, 230. 

 Frog, on the reproduction of the, 



466. 

 Fuchs (T. R. V.) on the structural 



conditions of iron, 389. 

 Galvanic current, on the heating 



power of the, 209. i ;, 



Gases, on the velocity of sound ini 



Geometrical demonstrations, remarUa = 



on, 286, 297, 332, 405. 

 reasoning, on some facts coii-y 



nected with, 127. V^' 



Gerhardt (M.) on anhydrous orgaiu<p * 



acids, 381. ;'" 



Gladstone (Dr. J. H.) on the relatioiuj 



between the atomic weights pf^\~ 



analogous elements, 313. ^ 



Glaisher (J.) on the determination iSi. 



the mean temperature or eyaly 



day in the year, 374. 5 y, ' '^ ,, 

 Godfray's (H.) Elementary Treatise 



on the Lunar Theory, reviewed, 



535. 

 Gold, occurrence of, in Pennsylvania, 



150 ; on the distribution of, 310. 

 Grove (W. R.) on some anomalous 



cases of electrical decomposition, 



203. 

 liaidinger (W,) on the direction of ^ 



the vibrations of the luminiferoiis 



tether in plane polarized light, 49. 

 Hamilton (Sir W. R.) on continued 



fractions in quaternions, 117, 236, 



321. ,^T 



Hansen (Prof.) on a new solution m 

 Kepler's problem, 132. 



Hardie (W.) on a new pseudoscope, 

 442. 



Hargreave (C. J.) on the valuation of 

 life contingencies, 39. 



Heat, on the mechanical theory of, 

 6, 112, 437, 483 ; of chemical com- 

 bination, 10; on the transmission 

 of, throughj organic structures, 



