800 



Index. 



Quinine nitropriissides, 318. 



Eainbow, supernumerary rings of the, 



186. 

 Revival of manuscripts on parchment, 



64. 

 Eigid body, problems in the dynamics 



of a, 213, 428. 

 Eings of the raiabow, supernumerary, 



186. 

 Eock- jointing, preliminary notice of a 



memoir on, 326. 

 Eocks, on the jointing of, in relation to 



engineering, 568. 

 Eocks, main Hues of jointing observable 



in, about the Bay of Dublia, 295. 

 Eocks of the Fintona and Curlew moun- 

 tain districts, report on, 475. 

 Eocks, supposed Upper Cambrian, in 



the counties of Tyrone and Mayo, 



343. 



Saccharates of ammonium and ethylam- 

 monium, distillation products of, 176. 



Satellite of a line meeting a cubic, on 

 the, 293. 



Schutzenberger's process for the volu- 

 metric estimation of oxygen in water, 

 135. 



Screws, contributions to the theory of, 

 661. 



Screw systems, on homographic, 435. 



Sea-beaches, especially those of "Wex- 

 ford and Wicklow, 191. 



Sea ice, glaciation by, 50. 



Seychelles Islands, list of spiders cap- 

 tured in the, 1 . 



Sidereal day, on the effects of the lunar 

 and solar tides in lengthening the, 

 605. 



Solomon Islands, crania of natives of 

 the, 774. 



Soundings taken in Lough Gill, on, 

 473. 



Spa at Mallow, report on the solid and 

 gaseous constituents of the, 75. 



Spectrum analysis, application of, to 

 the estimation of bUe, 272. 



Spiders captured in the Seychelles 

 Islands, list of, 1. 



Stars with a large annual parallax, ob- 

 servations in search of, 215. 



Strychnine nitroprusside, 316. 



Substitution of zinc for magnesium in 

 minerals, researches on the supposed, 

 146. 



Tangent cone, on the equation of a, to 



a quadric, 594. 

 Taste, nerve-action in connexion with 



the sense of, 257, 268. 

 Tidal equations, on complete, 231. 

 Tides, computation of, 656. 

 Tides at Fleetwood, computation of, 



111, 179. 

 Tides at Fleetwood, observations on, 



72. 

 Tides, observations of the, at Liverpool, 



351. 

 Tides at Eathmullan, illustrations from 



the, 73. 

 Tides, on the effects of lunar and solar, 



ia lengthening the duration of the 



sidereal day, 605. 

 Time, method of regulating a clock .in- 

 tended to show correct mean, 66. 

 Trigeminus, function of the, 257 



Ulster, report on the entomology of 

 certain districts in, 784. 



Vartry water, gaseous constituents of 



the, 79. 

 Varying action, proof of Hamilton's 



principle of, 69. 

 Veratiine nitroprusside, 321. 

 Volumetric estimation of chromium, on 



the, 86. 

 Volumetric estimation of oxygen in 



water, Schutzenberger's process for 



the, 135. 



Zinc, supposed substitution of, for mag- 

 nesium in minerals, researches on the, 

 146. 



END OF VOL, III. 



