GENERAL INDEX. 
323 
stating the results , 1875, 24 ; 1877, 
9 , 26 
^Phosphoric acid, estimation of, as pyro¬ 
phosphate of magnesia, T. R. Ogilvie 
on the, 1874, 66 
- acid, the quantity of, excreted from 
the system in connection with atmo¬ 
spheric conditions, Dr. T. Moffat on, 
1870, 61 
* -acid, the separation from iron- 
furnace cinder of, for manurial pur¬ 
poses, J. Hargreaves on, 1870, 60 
* -acids, Prof. Gamgee on the physio¬ 
logical action of pyro-, meta-, and 
ortho-, 1876, 64 
-chloride, S. Williams on the action 
of, on hydric sulphate, 1S69, 82 
- crude iron, the treatment of, in 
open-hearth furnaces, J. W. Wailes on, 
1886, 592 
^Phosphorite deposits of the South of 
France, J. E. Taylor on the age, fauna, 
and mode of occurrence of the, 1876, 96 
Phosphorous anhydride, the action of sun¬ 
light on, Rev. A. Irving on, 1883, 463 
—- oxide, Prof. T. E. Thorpe on, 1890, 
780 
^Phosphorus, Dr. Oppenheim on the 
action of, on alkaline solutions of 
metals, 1872, 79 
-Dr. T. Moffat on the luminosity of, 
1862, 47 ; *1867, 11 
— Dr. T. Moffat on the connection 
that exists between Admiral FitzRoy’s 
‘ caution telegrams ’ and the luminosity 
of, 1863, 24 
- C. Tomlinson on a remarkable 
structural appearance in, 1869, 78 
* -Dr. T. Moffat on the oxidation of, 
1869, 72 
- the difference in the poisonous 
activity of, in ortho-, meta-, and pyro- 
phosphoric acids, Prof. A. Gamgee, John 
Priestley, and Leopold Larmuth on, 
1876, 151 
- a new method of detecting, by its 
hydrogen compound, when in mixed 
gases, Dr. W. Bird Herapath on, 1864 ,31 
-chlorides, contributions to the his¬ 
tory of, by T. E. Thorpe, 1871, 81 
*——- pentachloride, the action of, on 
turpentine, Prof. Crum Brown on, 1876, 
62 
-trichloride, the action of, on or¬ 
ganic acids and on water, C. H. Both- 
amley and G. R. Thompson on, 1890, 
784 
-and copper, F. A. Abel on compounds 
of, 1865, 27 
*Photelectric engraving, Duncan C. 
Dallas on, 1863, 42 
*Photo-chemical printing in metallic 
platinum, a new process of, W. Willis, 
jun. on, 1878, 518 
Photo-electricity, an account of some 
experiments in, by G. M. Minchin, 
1880, 468 ; *1885, 940 
Photographic developer, Prof. G. D. 
Liveing on eikonogen a new, 1889, 533 
* -dry process, R. Sutton on a new, 
1871, 44 
-lens, Thomas Sutton on the pano¬ 
ramic, 1861, 33 
- lenses, A. Claudet on a variable 
diaphragm for telescopes and, 1866, 23 
-micrometers, Sir David Brewster on, 
1861, 28 
-negatives, a new method of print¬ 
ing, employing living leaves in place of 
sensitive paper, W. Gardiner on, 1889, 
519 
-operations connected with the transit 
of Venus, Capt Abney on, 1874, 19 
-pictures for the phenakistoscope, A. 
Claudet on, 1865, 9 
-plate, quantity of silver produced 
by the development of a, in terms of 
the intensity of the light acting, Capt. 
Abney on the, 1889, 493 
-plates, the action of magnetism on, 
P. Braham on, 1889, 519 
* - and photozincographic processes 
employed in the Ordnance Survey, Col. 
J. H. Bolland on the, 1888, 746 
-records given at the Kew observa¬ 
tory of the great magnetic storm of 
the end of August and beginning of 
September 1859, Balfour Stewart 011 
the, 1861, 47 
-revolver, Dr. J. Janssen on the, and 
on the observations of the transit of 
Venus made in Japan, 1875, 26 ; *1876, 
40 
- screens, improved, J. H. Starling 
on, 1879, 291 
-spectra of the electric light, Dr. W. 
A. Miller on, 1861, 87 
-spectrum of comet (Wells) 1, 1882, 
W. Huggins on the, 1882, 442 
- spectrum of the Great Nebula in 
Orion, W. Huggins on the, 1882, 443 
--star-discs, the nature of the, and 
the removal of a difficulty in measure¬ 
ments for parallax, Prof. C. Pritchard 
on, 1887. 580 
Photographie solaire, une nouvelle me- 
thocle de, et les decouvertes qu’elle 
donne touchant la veritable nature de 
la photosphere, Dr. J. Janssen sur, 
1878, 443 ; 1879, 282 
Photographing hydrogen and chlorine 
bulbs by aid of the flash of light which 
caused their explosion, Prof. P. 1’. 
Bedson on, 1888, 633 
Photographs, enamel, notice by Sir David 
Brewster respecting, executed by Mr. 
M‘Raw, 1867, 8 
- of geological interest in the United 
Y 2 
