Index. 
Optical Saccharometry, 167, 475. 
Oscillations of a rigid body about a fixed 
point, under the action of any forces, 
11. 
Oscillations, small, of a rigid body, 233. 
Ozone, on the production of, by Eesin 
Oils, 106. 
Parallel motion, 243. 
Pillars long, on the theory of, 491. 
Plagiophrys sphserica. Clap and Lachm, , 
99. 
Plates, description of— 
T 
55 
55 y- 
TT 
11., 
5 ' 
55 9- 
TTT 
ill., 
5 J 
.?. 
55 
15. 
'XT 
17. 
VI., 
5 5 
19. 
Vii., 
5 5 
20. 
VTTT 
V ±11., 
5) 
- 23. 
55 
26. 
A., 
27. 
Al., 
55 
32. 
XII., 
103. 
XIII., 
55 
105. 
XIV., 
139. 
XV., 
55 
191. 
XVI., 
5 5 
191. 
XVII., 
55 
195. 
XVIII., 
5 5 
231. 
XIX., 
55 
251. 
XX., 
55 
„ 296. 
XXI., 
55 
307-10. 
XXII., 
55 
321. 
XXIII., 
5 , 
322. 
XXIV., 
(by error XX.) 330. 
XXV., 
55 
477. 
XXVI., 
55 
493. 
XXVII., 
55 
„ 493. 
XXVIII., 
55 
496. 
XXIX., 
55 
501. 
XXX., 
55 
547. 
XXXI., 
55 
547. 
XXXIL, 
55 
55 
547. 
XXXIII., 
548. 
Pyr6la rotundifolia, found in Ireland, 
275. 
Rainbow lunar, and inverted halo, 548. 
Eesin, destructive distillation yielding 
Acetic Acid, 106. 
Eefein Oils, on the production of Ozone 
by, 106. 
Eespiration artificial, on an instrument 
for keeping up, 493. 
Eigid body, on small oscillations of, 233, 
Ehizopods freshwater, new or little 
known, 67. 
Ehizopods, on species among, 68. 
Saccharine matters, on a new step in 
the proximate analysis of, 1. 
Saccharometry, Optical, 167, 475. 
Salix Grahami, found in Ireland, 282. 
Salts Hydrated, solutions of, action of 
heat upon, 247. 
Sand, on the floatation of, by the rising 
tide, 153, 554. 
floatation of, on Eiver Ganges, 
252. 
Scirpus parvulus, found in Ireland, 286. 
Screw co-ordinates, 552. 
Selenium, on some forms, and on the 
influence of light on its electrical 
conductivity, 529. 
Serpentine marble, structure of, 132. 
Setubal, Hyalonema found near, 551. 
Sisyrhynchium bermudiana, found in 
Ireland, 284. 
Solar eclipse, on results of the Agosta 
expedition to observe the, 113. 
Spain, note on the great Dolomite bed 
of the north of, 225. 
Spectra of gases, on the cause of the 
interrupted, 107. 
Spectroscope, on a new form of, 208. 
Spontaneous generation, 30. 
Spores in Nostoc, 310. 
Streams flowing from same source in 
opposite directions, 36. 
Sugar beet grown in Ireland [1870], 
examination of, 169 ; [1872], 475. 
Suppuration, researches on, 156. 
Tetrapedia, Eeinsch, notes on the genus, 
296. 
Tetrapedia Crux Michseli, 299. 
gothica, 298. 
■ setigera, 305. 
Eeinschiana, 303. 
Thenardite, on the formation of, in con- 
nexion with the date of the Glacial 
Period, and the temperature that 
prevailed during it, 2. 
Theory of long pillars, 491. 
Tithonic stage of Herr Opel, 225. 
Transition of compounds from the 
calloid to the crystalloid condition, 
,..188. 
Trifolium glomeratum, found in Ire= 
land, 268. 
