INDEX. 
Atmospheric refraction at Port Bowen, Lieut. Foster’s observa- 
tions on, Part IV. No. 6. 
Attraction , local , cases in which its influence appears to be sensible 
pointed out, 574. 
Aurora Borealis, its effect on the magnetic needle imperceptible at 
Port Bowen, IV. 176. 
B 
Babbage, Charles, Esq. F. R. S., on a method of expressing by 
signs the action of machinery, 250. 
- - " ■■■ ■ ' — — on electric and magnetic rota- 
tions, 496. 
Bakerian Lecture. On the relations of electrical and chemical 
changes, by Sir H. Davy, Bart. P. R. S. 383. 
Balance for weighing great weights accurately, Capt. Rater’s ac- 
count of the construction of one, 36. 
Bell, C. Esq., on a nervous circle connecting the voluntary muscles 
with the brain, 163. 
Bevan, B. Esq., his account of experiments on the elasticity of 
ice, 304. 
Bivalves, their mode of burrowing in sand, 348 — locomotive, their 
mode of travelling, 350. 
Blindness from birth, a case of, removed, in a lady of advanced 
age, 529. 
Blood in aneurismal tumours, coagulation of by heat, 189 — effect of 
heat on, out of the body, 196 — buffy after venesection, a new fact 
respecting, 199. 
Bohnenberger, Professor, his claim to the first invention of the 
convertible pendulum admitted, 52. 
Bonne, Colonel, his observations of signals for determining the 
longitude of Paris, 86. 
Boring and burrowing marine animals. Mr. Osler on, 342. 
Bowen, Port. See Port Bowen. 
Bridges (suspension), their mathematical theory, 202. 
Brinkley, Rev. J., on the application of Capt. Rater’s floating 
collimator to the Dublin circle, 307. 
C 
Cambridge observatory, Mr. Woodhouse on its transit instrument, 
75. 
Camphor. A mode of obtaining it and other volatile solids in 
crystals, 490. 
Carburetted hydrogen , its liquefaction by pressure, 546. 
