GENERAL INDEX. 
215 
^Hydrochloric acid, Dr. A. Matthiessen 
and C. R. Wright on the action of, on 
morphia codeia, 1869, 69 
* -physical constants of liquid acety¬ 
lene and, G. Ansdell on, 1879, 309 
^Hydrocyanic acid, the synthesis of, Prof. 
Dewar on, 1879, 317 
Hydrodynamics , report on recent progress 
in: Part I., 1881, 57 ; Part II., Special 
problems , 1882, 39 
Hydrofluoric acid, L. Kessler on glass¬ 
engraving by, 1863, 44 
Hydrogen, absorption of, by electro-de¬ 
posited iron, W. Chandler Roberts on 
the, 1870, 62 
f -action of, on polycyanides, Thomas 
Fairley on the, 1864, 26 
-atom, the half of the, regarded as a 
primordial or formative element; and 
the representation of the chemical 
elements by physical forms on that 
basis; with models of the 25 elements 
from hydrogen to nickel constructed 
in accordance therewith, Dr. I. Ashe 
on, 1889, 546 
-and chlorine bulbs, on photograph¬ 
ing, by aid of the flash of light which 
caused their explosion, by Prof. P. P. 
Bedson, 1888, 633 
-dioxide, the mode of formation of, 
C. T. Kingzett on, 1882, 494 
--dioxide, reactions for the detection 
of, and the reactions for uranium, the 
limits of the, T. Fairley on, 1890, 783 
* - liquid, the density of, Prof. J. 
Dewar on, 1884, 679 
--nascent, W. H. Perkin on chloride 
of methylene obtained from chloroform 
by means of, 1868, 40 
-- and nitrogen, H. B. Baker on the 
alleged direct union of, 1883, 467 
- and oxygen, the rate of explosion 
of, H. B. Dixon on, 1885, 905 
* -peroxide and some uranium com¬ 
pounds, T. Fairley on, 1877, 51 
* —— sulphuretted, Maxwell Lyte on an 
apparatus for the preservation or dis¬ 
engagement of, 1864, 32 
-spectrum of, A. Schuster on the, 
1872, 38 
* -rays, G. Johnstone Stoney on the 
numerical relations between the wave¬ 
lengths of the, 1869, 24 
^Hydrogens, arseniuretted and anti- 
moniuretted, W. L. Scott on, 1865, 191 
Hydro-geological surveys, B. Latham on 
the importance of, from a sanitary 
point of view, 1876, 226 
,-survey of England, J. Lucas on the, 
1878,692 
*Hydro-geology, L’Abbe Richard on, 
1871, 109 
■-the quantitative elements of, B. 
Latham on, 1879, 499 
Hydrography, Dr. Hurlbert on the, of 
the St. Lawrence and the great lakes, 
1863, 73 
- past omd present, Lieut. G . T. 
Temple on, 1879, 229 
Hydroid zoophytes, Rev. Thomas Hincks 
on some new, 1864, 98 
Hydroida, Dr. G. J. Allman on the re¬ 
productive system in the, 1863, 351 
I. Sketch of the general morphology 
of the, 353 
II. Morphology of the gonopliore, 360 
III. Structure and formation of the 
generative elements, 382 
IV. Comparison of the sexes, 386 
V. Development, 389 
VI. Heteromerism of the individual, 
422 
Hydrology, G. Lemoine on the relation 
of forests to, 1872, 210 
Hydrometer, L. Oertling on the, and 
its adaptation to the present 
requirements of the Board of Inland 
Revenue, 1865, 21 
tHydrostatic balance, J. Joly on a, 1888, 
564 
Ilydrozoa, catalogue of Hebridean, 1866, 
'199 
-oceanic, Dr. Collingwood on, 1867, 
81 
Hygiene, Dr. R. Caton on the teaching 
of, in Government schools, 1874, 198 
* -physical education and, in 
schools, W. Jolly on, 1876, 207 
Hygrometer, G. Dines on a new, 1872, 59 
-self-registering, E. Vivian on, 1869, 
53 
Hygrometry of Ben Nevis, H. N. Dickson 
on the, 1887, 594 
-in the ‘ Meteorological Journal,’ by 
C. P. Smyth, 1889, 508 
• -wet- and dry-bulb formulae for, Prof, 
J, D. Everett on, 1871, 54 
Hyksos, the, or shepherd-kings of Egypt, 
notes on, by Rev. H. G. Tomkins. 
1888, 856 
Hylton Dene, near Sunderland, George 
S. Brady on the zoology of, 1863, 100 
ITymenoptera, John Lubbock on two 
aquatic, 1862, no 
Hyoid arch, the connection of the, with 
the cranium, Prof. Flower on, 1870, 136 
-plate of the Astei’olepis of the Old 
Red Sandstone, J. Miller on the 
so-called, 1871, 106 
Hyperelliptic functions, W. H. L. 
Russell on the, 1866, 6 
- functions, W. H. L. Russell on 
recent progress in elliptic and, 1869, 
334 ; 1870, 102 ; 1872, 335 
-integrals, the periods of the first 
class of, W. R Roberts on, 1880, 485 
Hypergeometric series, generalised, Prof, 
A. R. Forsyth on a, 1883, 408 
