196 
INDEX II. 
TO 
MISCELLANEOUS COMMUNICATIONS TO THE 
SECTIONS. 
ACARUS that attacks grasses, on an, 
124. 
Acid, sulphurous, on the employment of, 
asa purifying agent on the sugar from 
the south of Spain, 60; on a direct 
method of separating arsenious, from 
arsenic, and on its application to the 
estimation of nitric acid, 62; on the 
proportion of phosphoric, in some na- 
tural waters, 63. 
Atherification, results of a research on, 
65. 
_Air, on a mode of cooling the, of tropical 
climates, 188. 
Airy (G. B., Astronomer Royal) on a 
question of probabilities which occurs 
in the use of a fixed collimator for the 
verification of the constancy of position 
of an azimuth circle, 1. 
Alison (Dr.) on the system of Croft hus- 
bandry and the reclamation of waste 
lands, chiefly by spade-culture, adopt- 
ed at Gairlochin, Rosshire, since 1846, 
and its results as illustrating the con- 
diticns under which the labour of pau- 
pers and criminals may safely be made 
productive, 147. 
Alumina, on the isomorphous relations of 
silica and, 50. 
Amalgams, on some, 55. 
Anacharis Alsinastrum, on, 112. 
Anderson (Dr.) on the action of oxidizing 
agents on certain organic bases, 47 ; 
on a compound of iodine and codeine, 
48; on the fossil fishes and yellow 
sandstone of Dura Den, 70. 
Anemometer, on registers from Mr. Fol- 
lett Osler’s new integrating, 46. 
Animals in the Crustacean tribes, on the 
change of the integuments of, 120. 
Anomoura, on the uses of the fifth pair 
of legs in the, 117. 
Appold (J. G.) on a register hygrometer 
for regulating the atmospheric moisture 
of houses, 170. 
Aqueous vapour in the atmosphere at 
various places and heights, on the 
means of computing the quantities of, 
36. 
Architecture, on the geometrical basis of 
beauty in general, as applied to, 131. 
Argyll (the Duke of) on a fossiliferous 
deposit underlying basalt in the island 
of Mull, 70. 
Ashiesteel, on the rubble bridge of, 187. 
Assyrians, on the language and mode of 
writing of the ancient, 140. 
Astronomy, 23. 
Atmosphere, on some new phenomena 
in the polarization of the, 6; on the 
effect of height in the, on the diurnal 
variation of magnetic declination, 7 ; 
on the attempts to resolve the pressure 
of the, into two parts, 31; on the 
means of computing the quantities of 
aqueous vapour in the, at various places 
and heights, 36. 
Atmospheres, on the growth of plants in 
abnormal, 54. 
Austen (Robert) on recent changes of 
sea-level, 71. 
Azimuth-circle, on a question of proba- - 
bilities which occurs in the use of a 
fixed collimator for the verification of 
the constancy of position of an, 1. 
Babington (C. C.) on Anacharis Alsinas- 
trum, 112. 
Barrande (M.), Sir R. I. Maurchison’s 
view of the labours of, in preparing his 
work, ‘“ The Silurian System of Bohe- 
mia,” 97. 
Barytes and platinum, on the optical 
- properties of the cyanurets of, 5. 
Basalt in the island of Mull, on a fos- 
siliferous deposit underlying, 70. 
Bate (C. Spence) on Crustacea, 115. 
Beattie (George) on an improved door 
spring, 170. 
Beauty, on the geometrical basis of, as 
