GENERAL INDEX. 
339 
^Purser (Prof. J.) on the modification 
of the motion of waves produced by 
fluid friction, 187G, 31 
*-on the applicability of Lagrange’s 
equations to certain problems of fluid 
motion, 1878, 463 
—— on the measurement of the lunar 
disturbance of gravity, 1880 , 25 ; 1881, 
93 ; 1882, 95 
Purton (Rev. W.) on the geology of 
Coalbrook Pale, 1865, 72 
Purulent discharges, Dr. W. Bird Hera- 
path on the occurrence of indigo in, 
1864, 124 
Purus, Richard Spruce on the river, 
1864, 148 
-W. Chandless on an ascent of the 
river, 1865, 116 
Pus, Dr. J. Hughes Bennett on the for¬ 
mation of, in reference to the doctrine 
of cell pathology, 1865, 101 
*Puseley (D.) on Thompson’s universal 
stopper for bottles, 1863, 180 
Putnam (F. W.), notice of exploration of 
a group of mounds in Ohio, 1884, 899 
'^Putrefaction, germ-theory of, Dr. J. 
Dougall on the relative powers of 
various substances in preventing the 
generation of animalcules or the de¬ 
velopment of their germs, with special 
reference to the, 1871, 124 
-relative power of various substances 
in preventing, and the development 
of protoplasmic and fungus life, Dr. 
Crace-Calvert on the, 1872, 69 
-sulphuretted hydrogen as a product 
of, Dr. Moffat on, 1861, 89 
Putumayo, the river, South America, the 
ascent of, A. Simson on, *1876, 184 ; 
1877, 149 
Puydt (Lucien de), exploration of the 
Isthmus of Darien, with a view to 
discovering a practical line for a ship 
canal, 1867, 128 
Pycnogonoidea, list of the British, by 
George Hodge, 1863, 102 
Pye-Smith (Dr. P. H.) on the nature 
of intestinal secretion , 1874. 54 ; 1875, 
339 ; 1876, 308 
-Address to the Department of Ana¬ 
tomy and Physiology, 1879, 406 
- on the influence of bodily exercise 
on the elimination of nitrogen , 1880, 
159 ; 1882 , 242 ; 1883, 242 ; 1884, 265 
- on the Scottish zoological station , 
1881, 177 ; 1882, 282 ; 1883, 233 
- (R. J.) on the German and other 
systems of teaching the deaf to speak, 
1880, 216 
Pygmy languages of Africa, Hyde Clarke 
on the classification of the Akka and, 
1874, 147 
^Pyramid, exhibition of photographs of 
the interior of the Great, taken with 
the magnesium light by Prof. C. Piazzi 
Smyth, 1865, 40 
Pyrenees, C. Martins et E. Collomb sur 
l’ancien glacier de la vallee d’Argeles 
dans les, 1867. 66 
^Pyrenees, P. W. Stuart Menteath on 
Tertiary and Post-tertiary action in 
the, 1867, 70 
-the retention of ancient and pre¬ 
historic customs in the, Dr. Phene on, 
1880, 627 
* Pyridine bases, chinoline and, further 
researches by Prof. Dewar and Dr. 
McKendrick, on the physiological 
action of the, 1875, 165 ; *by W. Ramsay 
and Dr. McKendrick, 1877, 111 
-series, summary of investigations on 
the, by Dr. W. Ramsay, 1878, 511 
Pyrites, formation of, in a South Stafford¬ 
shire coal-pit, Lovibond Peicival on 
the, 1865, 71 
-various kinds of, used on the Tyne 
and neighbourhood in the manufacture 
of sulphuric acid, J. Pattinson on the, 
1863, 49 
*Pyrocatechin as a derivative of certain 
varieties of tannic acid, Dr. J. Watts 
on, 1877, 53 
Pyrocresols, the derivatives and the con¬ 
stitution of the, Dr. W. Bott and Prof. 
H. Schwarz on, 1887, 669 
-further researches on the, by Dr. 
W. Bott and J. B. Miller, 1888, 642 
Pyrola rotundifolia, the parasitic habits 
of, T. Gibson on, 1870, 116 
Pyrometer , Siemens's, report of the 
Committee appointed to test, 1872, 
134 ; 1874, 242 
Pyrophosphoric acid, the action of, on 
the circulation, Prof. A. Gamgee, J. 
Pjiestley, and L. Larmuth on, 1876, 
1 5 2 
*Pyro tartaric acid, remarks, by W. 
Dittmar, onReboul’s paper on, 1876. 63 
Python ( Python molurus ), observations 
on the incubation of the Indian, by 
W. A. Forbes, 1881, 723 
^Quadratic surds, a linear relation 
between two, Prof. H. J. S. Smith on, 
1881, 538 
Quadrature of the circle, J. W. L. 
Glaisher on Lambert's proof of the 
irrationality of tt, 1871, 12 
Quadratures and interpolation, the ap¬ 
plication of, to actual data, C. IF. 
Merrifield on the present state of know¬ 
ledge of, 1880, 321 
Quadric transformation, Prof. T. A. 
Hirst on, 1865, 6 
*- transformation, the effect of, on 
the singular points of a curve, Prof. 
H. J. S. Smith on the, 1875, 21 
z 2 
