INDEX. 
B 
P*g* 
Babbage, C., Esq. An essay towards the calculus of functions, 3 S 9 
Baryta , an easy method of procuring it pure, by means of 
chlorionic acid, - - - 211 
Brewster, David, LL.D., additional observations on the 
optical properties and structure of heated glass and unan- 
nealed glass drops, - - 1 
Experiments on the depolari- 
sation of light as exhibited by various mineral, animal, and 
vegetable bodies, with a reference of the phenomena to the 
general principles of polarisation, - 29 
— On the effects of simple pres- 
sure in producing that species of crystallization which 
forms two oppositely polarised images, and exhibits the 
complementary colours by polarised li'z,ht, - 60 
— On the laws which regulate 
the polarisation of light by reflection from transparent 
bodies, - - 125 
. On the multiplication of images, 
and the colours which accompany them, in some specimens 
of calcareous spar, - - 270 
Bridlington , on an ebbing and flowing stream discovered by 
boring in the harbour of that place, - - 54 
C 
Calcareous spar , on the cause of the multiplication of the 
images in it, - - 278 
■ on the cause of the colours with which the 
images are affected in it, - - - 282 
Carp , experiments on them, - - - 91 
Chaptal, M. His paper published in the 70th Volume of 
“ Annales de Chimie,” p. 22, referred to, - 99, 115 
Children, John George, Esq. An account of some expe- 
riments with a large voltaic battery, - - 363 
Clift, Mb. William, Experiments to ascertain the influ- 
ence of the spinal marrow on the action of the heart in 
fishes, - 91 
Colours , complementary , description of new instruments for 
exhibiting them, - - 287 
— black and brown, on those used by the Ancients in 
painting, - - - 116 
