INDEX. 
Blood, globules of, in the human body, their diameter mea- 
sured, - - - - 173 
- ■■ ■ ■ , are neither of the same size, nor the same 
shape in all animals, - - * 174 
Braces , diagonal, on the great strength given to ships of 
war by the application of them, - « 1 
Brewster, David, LL. D. On the laws of polarisation 
and double refraction in regularly crystallized bodies, 199 
Brinkley, John, D.D. On the parallax of certain fixed 
stars, - - - 275 
Bornky, Capt. James. A memoir on the geography of 
the north eastern part of Asia, and on the question 
whether Asia and America are contiguous, or are sepa- 
rated by the sea, - - 9 
C 
Caloric , new experimental researches on some of the lead- 
ing doctrines of it ; particularly on the relation between 
the elasticity, temperature, and latent heat of different 
vapours; and on thermometric admeasurement and 
capacity, - - 338 
Capacity , on the doctrines of, - - 37S 
Celestial objects , of a method to represent the profundity 
of them in space by a diagram, - - 451 
— — - — — ~ — — — ■ remarks on those that are ambiguous, 460 
* ■ ambiguous , of the extent of the power of 
our telescopes to reach into space when they are di- 
rected to them, - - 466 
Chlorine , on the fallacy of the experiments in which water 
is said to have been formed by its decomposition, 169 
Crystals , on those which produce double refraction, 205 
— — on those with one apparent axis of polarisation, 210 
Crystals, a list of those with one apparent axis of double 
refraction and polarisation, - - 211 
— — on those with two or more axes of polarisation, 221 
— on the polarising structure of those that have the 
cube, the regular octohedron, and the rhomboidal do- 
decahedron for their primitive form, - 254 
on the laws of double refraction in those with 
any number of axes, - - - 267 
doubly refracting , a table of them, - 207 
