INDEX II. 
_ cial, industrial, and natural resources 
of, 177. 
Peru, prehistoric, T. J. Hutchinson on 
the anthropology of, 154, 
Petrified wood of Lough Neagh, Prof. 
Hodges on the, 58, 
Phené (J. 8.) on “ An Age of Colossi,” 
157; on “Natural Mythology,” and 
some of the incentives to its adoption 
in Britain and Ireland, 158. 
Phipson (Dr. T. L.) on asesquisulphide 
of iron, 66; on the presence of cyano- 
gen in commercial bromine, and a 
means of detecting it, 66. 
Pheenician inscription of Brazil, Hyde 
Clarke on the, 146, 
*Phosphoric acid, T. R. Ogilvie on the 
estimation of, as pyrophosphate of 
magnesia, 66, 
Photographic operations connected with 
the transit of Venus, Capt. Abney on, 
19. 
Photography in connexion with astro- 
nomy, Col. 8. Wortley on, 20. 
Physical conditions of the deep sea, Dr. 
. B. Carpenter on the results of 
the ‘ Challenger’ researches into the, 
172. 
* 
theory of undercurrents, Dr. W. 
B. Carpenter on the, 22. 
units of nature, G. J, Stoney on 
the; 22. 
*Physics of the internal earth, Dr. 
Vaughan on the, 22, 95. 
*—_., practical, Prof. W. F. Barrett on 
the teaching of, 22. 
*Physiology of the semicircular canals 
of the ear, Prof. Crum Brown on some 
_ points in the, 158. 
Political economy and the laws affecting 
the prices of commodities and labour, 
F, P. Fellows on, and on strikes and 
lock-outs, 203. 
Pollen-grains, A. W. Bennett on the 
form of, in relation to the fertilization 
of flowers, 133. 
Polyzoa from the Lower and Bere 
Silurian rocks of North America, de- 
scriptions of new species of, by Dr. H. 
A. Nicholson, 90. 
Pontine Marshes, Dr. H. MacCormac on 
the reclamation and sanification of 
the, 209. 
* Pontonia, an undescribed, Prof. Cun- 
ningham on, 157. 
Porter (Rev. J. L.) on a recent journey 
east of the Jordan, 179, 
Postal reform, W. Hastings on, 209. 
Potato-disease, J. Torbitt on the, 134. 
Power-couplings for rolling-mills and | 
247 
other machinery, F. H. Varley and E. 
Furness on, 231. 
Prehistoric times in the north of Ire- 
oy a glimpse of, by W. J. Knowles, 
Prices of commodities and labour, F. P. 
Fellows on political economy and the 
laws affecting the, 203. 
“Primitive Marriage,” J. J. Murphy on 
M‘Lennan’s theory of, 156, 
a of penal legislation, Rey. J. 
T. Burt on the, 192. 
*Prisms, Nicol’s, W. Ladd on the con- 
struction of large, 26, 
Privileges over land, wrongly called 
propa, Sir G. Campbell on the, 
5 
*Purser (Prof. F.) on bitangents to the 
surface of centres of a quadrie, 19. 
(Prof. J.) on the source from which 
the kinetic energy is drawn that 
passes into heat in the movement of 
the tides, 22. 
Pygmy languages of Africa, Hyde Clarke 
a classification of the Akka and, 
*Quadric, Prof. F, Purser on bitangents 
to the surface of centres of a, 19, 
*Quadrics and other surfaces, W. Spot- 
tiswoode on multiple contact of, 19. 
Quaternions, Prof. Everett on a new 
application of, 11. 
Railway accidents, the prevention of, 
and automatically recording the move- 
ments of the points and signals and 
other apparatus of railways, W. Smith 
on, 229. 
Rainfall of Ulster, J. Smyth, jun.,; on 
the, 39. fc ris 
Rain-gauge, a gymbal-swung, F, Pas- 
torelli on, 37. 
cae G. J. Symons on a new form of, 
Ravenstein (H. G.) on Dr. G. Nachti- 
gall’s explorations in Africa (1869- 
74), 175. 
Reclamation and sanification of the 
Pontine Marshes, Dr. H. MacCormac 
on the, 209. 
*Reconnaissance of a new or partially 
rt country, Lieut. Warren on, 
Redfern (Prof.), Address by, to the Bio- 
logical Section, 96 ; *on the influence 
of food, and the methods of supplying 
it to plants and animals, 143; *on 
the effects of ozone on the animal 
economy, 143, 
