200 
GENERAL INDEX. 
spermatophore of some of the Indian 
species of the, Col. H. H. Godwin- 
Austen on, 1879, 377 
♦Helicoidal asymmetry, a model illustra¬ 
ting, and particularly the formation of 
right- and left-handed helicoidal crys¬ 
tals from a non-helicoidal solution, Sir 
W. Thomson on, 1883, 405 
Heliocentric theory, J. Schvarcz on the 
probable origin of the, 1862, 17 
Heliograph or sun signal, an improved, 
Dr. T. Anderson on, 1880, 461 
Heliostat, G. Johnstone Stoney on a cheap 
form of, 1869, 53 
Helopeltis antonii, Sign, in Ceylon, note 
on, by H. Trimen, 1886, 711 
♦Helmholtz (Prof, von), further re¬ 
searches concerning the electrolysis of 
water, 1887, 589 
Helmholtz’s views on electrolysis, Prof. 
A. Schuster on, 1885, 977 
Helminth parasites, the relation of, to 
grouse disease, a note on, by Prof. F. J. 
Bell, 1887, 770 
Hemsley (W. B,), summary analysis of 
the flora of Sussex (Phasnogams and 
Ferns), 1872, 128 
♦ -result of the investigations of in¬ 
sular floras, 1884, 772 
-- botanical bibliography of the Lesser 
Antilles , Caribbee Islands , or Wind¬ 
ward and Leeward Islands , West 
Indies , 1888, 438 
Henderson (Andrew) on the rise and 
progress of clipper and steam naviga¬ 
tion on the coasts and rivers of China 
and India, 1861, 258 
--on routes between India and China, 
1863, 137 
♦ -on the practical progress of naval 
architecture in ocean and river steamers, 
&c., 1864, 186 
♦ -(Frank) on the leather manufac¬ 
ture of Dundee, 1867, 140 
-(John) on the age of the felstones 
and conglomerates of the Pentland 
Hills, 1871, 101 
-(W.), the history of copper extrac¬ 
tion by the wet way, 1876, 64 
- on a new process for separating 
silver from copper contained in copper 
ores and reguluses, 1880, 546 ; remarks 
and statistics relating to Swansea 
usages and customs as they affect the 
sellers of foreign or colonial copper 
ores, 681 
-(W. D.) on commercial panics, 1873, 
193 
- on Adam Smith’s theory of rent, 
1878, 677 
Hendricks (Frederick) on a uniformity 
of weights and measures, 1887, 468 
Hennessey (J. B. N.) on meteoric dust , 
1883, 126 
Hennessy (Prof. Henry) on the trans¬ 
mission of sound-signals during fogs at 
sea, 1861, 173 ; 1863, 105 ; 1865, 192 ; 
1866, 212 
-on a probable cause of the diurnal 
variation of magnetic dip and declina¬ 
tion, 1861, 39 ; on the connection be¬ 
tween storms and vertical disturbances 
of the atmosphere, 61 
- on the vertical movements of the 
atmosphere considered in connection 
with storms and changes of weather , 
1862, 165 
-on some of the characteristic dif¬ 
ferences between the configuration of 
the surfaces of the earth and moon, 
1862, 14 ; on the relative amount of 
sunshine falling on the torrid zone of 
the earth, 31 
- report on the uniformity of weights 
and measures, 1863, 102 ; 1865, 375 ; 
1866, 352 ; 1867, 468 ; 1868, 484 ; 1869, 
308 ; 1870, 132 ; 1871, 198 ; 1874, 359 
-on the possible connection between 
the ellipticity of Mars and the general 
appearance of its surface, 1864, 5 ; on 
the regression of temperature during 
the month of May, 17 ; on the possible 
conditions of geological climate, 55 
* -on the probable cause of the exist¬ 
ence of a North European flora in the 
West of Ireland, 1866, 74 
* -on meteoric showers considered 
with reference to the motion of the 
solar system, 1866, 21 ; on the diurnal 
period of temperature in relation to 
other physical and meteorological 
phenomena, ib. 
-on the possible introduction of 
South European plants in the West and 
South of Ireland, 1868, 98 
- on the influence of the physical 
properties of water on climate, 1875, 
29 ; on the possible influence on cli¬ 
mate of the substitution of water for 
land in Central and Northern Africa, 
30 
-on the decrease of temperature with 
height on the earth’s surface, 1876, 39 ; 
on the distribution of temperature over 
the British Islands, ib. ; *on new stand¬ 
ards of measure and weight, 49 
* -on the physical properties of solids 
and liquids in relation to the earth’s 
structure, 1877, 42 
-on the limits of hypotheses regard¬ 
ing the physical properties of the 
matter of the interior of the earth, 
1878, 485 ; on the climate of the 
British Islands, ib. 
Henrici (Prof. 0 .), Address to the Ma¬ 
thematical and Physical Section, 1883, 
393 
- on instruction in elementary geo - 
