112 
GENERAL INDEX. 
Deserts of Africa and Asia, P. de Tehi- 
hatchefon the, 1882, 356 
Desmid, a hybrid, A. W. Bennett on, 
1889, 620 
De Souza (Dr. Jacintho Antonio), report 
presented to the Portuguese Government 
relating to the observatory at Ken, 
1862, 109 
Determinants, J. W. L. Glaisher on cer¬ 
tain, 1876, 13 
f-the values of a class of, J. W. L. 
Glaisher on, 1877, 20 
- elementary demonstration of the 
theorem of multiplication of, by M. 
Falk, 1878, 473 
-- the reduction of algebraical, W. 
H. L. Russell on, 1885, 910 
Development, H. M. Westropp on the 
cycle of, 1875, 179 
-of institutions, on a method of in¬ 
vestigating the, applied to laws of 
marriage and descent, by Dr. E. B. 
Tylor, 1888, 840 
Devil’s Arrows (Yorkshire), A. L. Lewis 
on the, 1877, 118 
Devon, Dr. W. R. Scott on the occurrence 
of Orcynus alalonga on the coast of, 
1865, 93 
- and Cornwall, on the marine fauna 
and flora of the south coast of ', 1865, 51 ; 
1867, 275 ; 1869, 84 ; 1872, 48 ; on the 
marine zoology of, 1879, 165 ; 1880, 
160 ; 1881, 198 
- South, the discover } 7 of a species of 
starfish in the Devonian beds of, A. 
Champernowne on, 1873, 77 ; H. Wood¬ 
ward on, ib. 
- South, the succession of Palaeozoic 
deposits of, A. Champernowne on, 
1877, 66 
- and Cornwall, W. Pengelly on the 
correlation of the slates and limestones 
of, with the Old Red Sandstones of 
Scotland, kc., 1862, 85 
* -Frank Buckland on the salmon 
rivers of, 1869, 111 
* - N. Whitley on the distribution of 
chalk flints and flakes in, 1869, 103 
-in prehistoric times, T. M. Hall on 
the method of forming the flint flakes 
used by the early inhabitants of, 1869, 
134 
Devonian, uppermost, J. W. Salter on the 
identity of the PTpper Old Red Sand¬ 
stone with the, and of the Middle and 
Lower Old Red with the Middle and 
Lower Devonian, 1862, 92 
-group considered geologically and 
geographically, R. A.C.Godwin-Austen 
on the, 1869, 88 
-age, rocks of, Prof. J. Hall on the 
occurrtnce of trunks of Psaronius in 
an erect position resting on their ori¬ 
ginal bed in, in the state of New Ybrk, 
with some inferences regarding the 
condition of the sea-bottom and shore¬ 
line during the deposition of the strata, 
1872, 103 
Devonian system in England and in Bel¬ 
gium, G. Dewalque on the, 1877, 69 
-rocks near Newton Abbot and Tor¬ 
quay, notes on the, by H. B. Wood¬ 
ward ; with remarks on the subject of 
their classification, 1877, 78 
- the Lower and Middle, in West 
Somerset, the relations of, W. A. E. 
Ussher on, 1886, 649 
--- rocks of West Somerset, on the 
borders of the Trias, W. A. E. Ussher 
on the, 1887, 720 
-rocks of Great Britain, W. A. E. 
Ussher on the, 1889, 578 
- ganoid Ongchodus, the occurrence 
of the, in Spitzbergen, A. S. Woodward 
on, 1889, 584 
-rocks, as described in De la Beche's 
report, interpreted in accordance with 
recent researches, W. A. E. Ussher on 
the, 1890, 801 
Devono-Siiurian formation, Prof. E. Hull 
on the, 1881, 631 
Devonport, H. K. Barnber on the water- 
suppl } 7 of, 1869, 60 
^Devonshire, Triassic rocks of, W. Pen¬ 
gelly on the chronological value of the,. 
1863, 85 
* -H. C. Hodge on the origin of 
certain rocks, and on the ossiferous 
caverns of the south of, 1864, 57 
--South-eastern, W. Pengelly on the 
changes of relative level of land and 
sea in, in connection with the antiquity 
of mankind, 1864, 63 
- Association for the Advancement 
of Science and Art, Sir John Bowring’ 
on the, 1869, 179 
-the geography of consumption in : 
deaths from consumption during the 
ten years 1861-70, Dr. W. H. Pearse on. 
1877, 112 
De Yeij (Dr. J. E.) on the possibility of 
manufacturing Neroli in the British 
Colonies, 1865, 39 ; on the rotatory- 
power of several essential oils, 40 
Dew and its effects, Dr. H. Hudson on 
the formation of, 1869, 39 
Dewalque (G.) on the Devonian system 
in England and in Belgium, 1877, 
69 
Dewar (J.) on coal-tar bases, 1868, 35 ; 
on Ivekule’s model to illustrate graphic 
formulas, 36 
* - on thermal equivalents: ( 1 ) fer¬ 
mentation ; ( 2 ) oxides of chlorine, 
1870, 54 
-- on the thermal equivalents of the 
oxides of chlorine, 1871, 193 
-on recent estimates of solar tem- 
