694 INDEX. 
Barometer, observations on it at Manchester, - 
*~ Beautiful, in the human form, essay on, 407—our' 47 
idea of it derived from contemplating a medium form, 
Bellows, an instrument to measure the force of their 
blast, - - - - - = 
Benefits, and duties of Literary and Philosophical 
Societies, essay on, - ee é: 
Betula nigra, or Birch, black” American, recom- 
mended for quick growth, &c. ko a - 
Bleaching, a new method of, - - 
Brown, Dr. on an universal written character, - 
Cc 
Caloric, materiality of it supported, 609, et seq.— 
seems subject to the laws of chemical affinity, - 
Celts, account of some, lately found in the river’ 
Ribble, - - - - 
Cold (absolute) or the point of total privation of 
heat, new method of inferring it, g : 
Cox.ier, Mr. on iron and steel, 109—on fermen- 
tation, and distillation of ardent spirit, - - 
Colour, of a Negro, remarkable change in, - 
Colours, instances of extraordinary vision of, - 
Complexion, florid, appears to some people, blue, 
Cotton-trec, (Persian) an account of, - - 
D 
Darton, Mr. on extraordinary vision of colours, 
28—on the quantity of rain, compared with evapora- 
tion, &c. 346—on the origin of springs, 367—on the 
power of fluids to conduct heat, 373—-on the heat and 
cold produced by the mechanical condensation and 
rarefaction of air, 515—on the constitution of mixed — 
gases, 538—on the force of steam in vacuo, 550—on 
