INDEX 
TO THE 
PHILOSOPHICAL TRANSACTIONS 
FOR THE YEAR 1855. 
Airy (G. B.). On the computation of the Effect of the Attraction of Mountain-masses, as dis- 
turbing the Apparent Astronomical Latitude of Stations in Geodetic Surveys, 101. 
Attraction of mountain-masses, effect of, in geodetic surveys, 53, 101 (see Pratt, Airy). 
B. 
Bakerian Lecture, On the Nature of the Force by which Bodies are repelled from the Poles of 
a Magnet, &c., 1. 
Barlow (W. F.). Observations on the Respiratory Movements of Insects, 139. — Natural respi- 
ratory movements of the Dragon-fly, 139; influence of decapitation, 140; influence of shock, 
142; respiration in the separate segments of the insect, 143; conclusions, 147. 
Barlow (W. H.). On the existence of an element of Strength in Beams subjected to Transverse 
Strain, arising from the Lateral Action of the fibres or jiarticles on each other, and named by 
the author the ‘ Resistance of Flexure,’ 225. — Determination of the neutral axis, 225 ; effect 
of lateral action considered, 228 ; resistance to flexure and increase of strength thence 
resulting, 230; experiments, 231, &c. 
Beams, on an element of strength in, 225 (see Barlow). 
Binney (E. W.) and J. D. Hooker. On the Structure of certain Limestone Nodules enclosed 
in seams of Bituminous Coal, with a Description of some Trigonocarpons contained in them, 
149. 
C. 
Cairo, recent researches near, 105 (see Horner). 
Cheletropis Huxleyi, anatomy of, 289, 295 (see Macdonald). 
Chemical affinity, on circumstances modifying the action of, 179 (see Gladstone). 
Chlororubian, 407. 
Coloured salts, experiments with, bearing on chemical affinity, 179 (see Gladstone). 
