236 
on the relations of the metamorphic 
and older palozoic, in Scotland, 100 ; 
on some phznomena at the junction of 
the granite and schistose, in W. Cum- 
berland, 106; on some peculiarities in 
the arrangement of the minerals in 
igneous, 107 ; on determining the tem- 
perature and pressure at which various, 
were formed, ib. 
Rogers (Prof.) on the discovery of strata 
of supposed Permian age, in the inte- 
rior of N. America, by Mr. Meek and 
other American geologists, 224. 
Rowley Rag quarry, photograph of the, 
93 
(R. Sagittarii), a new variable star, 29, 
Russians, identification of the, with the 
Roxolani, 148. 
Russo-Chinese frontier and the Amoor 
river, on the, 147. 
Sadler (J. H.) on Indian fibres, illustrated 
by prepared specimens, 195. } 
Salts, on the expansion of, 46; on reci- 
procal decomposition between, and their 
acid solvents, 50. 
Samuel (Mr.) on an early form of the 
lenticular stereoscope constructed for 
the use of schools, 19. 
Sandstone, on the yellow, 74. 
Sanitary and industrial economy of the 
borough of Leeds, on the, 164. 
Schlagintweit (Adolphe), his death con- 
firmed, 152. 
Schomburgk (Sir R.) on the project of a 
canal across the isthmus of Kraw, 153. 
Schénbein’s (Prof.) account of his latest 
experiments on the allotropic conditions 
of oxygen, 52. 
Scilly Isles, on the geology of the, 109. 
Scotland, on recent researches among the 
older rocks of the highlands of, 94 ; on 
the age and relations of the gneiss 
rocks in the N. of, 96; paleontology 
of the tilestones or Silurio-Devonian 
strata of, 104; on the relations of the 
metamorphic and older palzeozoic rocks 
in, 105. 
Screw, functions of the, in steam vessels, 
215. 
Seal, on the skeleton of a, from the 
pleistocene clays of Stratheden, 1038. 
Sertularia tamarisca, on the reproductive 
organs of, 119. 
Sewing machine in Glasgow, on the, 
198. 
Shaw (Dr. Norton) on the geography of 
British N. America, more particularly 
British Columbia, Frazer River, &c., 
153, 
INDEX II. 
Shells, on the liability to injury of, from 
the growth of a fungus, 128. 
Shell bed of the S. Wales coal basin, on 
the marine, 80. 
Silbermann (M., I. Joseph) on a method 
for the spherical printing of globes, 
154; on a universal printing press, 
220; on a universal cock, 221. 
Siljestrém (Dr. F. A.) on the conditions of 
equilibrium in a rotating spheroid, 5 ; 
on the distribution of heat in the inte- 
rior of the earth, 23; on the magnetic 
dip at Stockholm, 27; on the constitu- 
tion of comets, 80; on observations of 
temperature, 39. 
Silurio-Devonian strata of Scotland, on 
the, 104. 
Skeleton, on the homology of the, 126. 
Smith (Dr. KE.) on a new method of de- 
termining the quantity of carbonic acid 
contained in the air, 66; on the results 
obtained from an extended inquiry into 
the quantity of carbonic acid evolved 
from the lungs under the influence of 
various agents, 142; on the methods 
hitherto adopted for the determination 
of the carbonic acid contained in the 
expired air, with the description of a 
new method, 7d. 
Smith (R.) on a wreck intelligencer, 221. 
Smith (S.) on the bursting of guns and 
cannons, 221. 
Smith (W. L.) on the choice of subject 
in photography, and the adaptation of 
different processes, 66. 
Smyth (Admiral), on the results of the 
measures of Gamma Virginis for the 
epoch 1858, as determined by, 29. 
Snow, on a fresh form of crystallization 
which takes place in the particles of 
fallen, under intense cold, 40. 
Society of Arts’ Examinations, on some 
of the results of the, 180. 
Scemmering, on the structure of the retina 
at the foramen of, 141. 
Sorby (H. C.) on a new method of deter- 
mining the temperature and pressure 
at which various rocks and minerals 
were formed, 107; on some peculiar- 
ities in the arrangement of the minerals 
in igneous rocks, ib.; on the currents 
present during the deposition of the 
carboniferous and permian strata in 
South Yorkshire and North Derby- 
shire, 108. 
Sound, on the mathematical theory of, 34, 
Spectrum, solar, on the fixed lines of the, 
17. 
Sphere, on the geometrical projection of 
two-thirds of the surface of the, 151. 
