INDEX. 33 



Brewster (Dr.), observation of, on a peculiar fracture of quartz, 

 xviii. IGG, 167 



Brianchon (M.), on the explosion of fulminating powders, xix. 

 348, 349 



Bridge, ancient Roman, discovered, vi. 382 



ancient, over the Rhine, notice of, vii. 19G 



•^ over the Arno, notice of, xiv. 225 



of tlie Holy Trinity at Florence, observations on the cur- 

 vature of the arches of, xv. 1-8. Economical one at Annonay, 

 13G. Observations on the taking down and rebuilding of 

 London Bridge, 269-278. Notice of the laying of the first 

 great iron plate for tlie bridge at Menai Straits, 3G7 



Bridges and bridge-building, accounts of, iv. 141 



' notice of improvements in the structure of, xvii 



chain, xx. 162 



Brinkley's (Professor) observations and elements of the orbit of 

 the great comet of 1819, ix. 164 



observations of, on refraction, xi. 364-370 ; and on 



M. Delambre's remarks relative to the problem of finding the 

 latitude from two altitudes, and the time between, 370 



on an easy method of computing the aberration of the 



stars, xii. 151-154. Notice of his observations for investigat- 

 ing the effects of the parallax and aberration of the places of 

 certain fixed stars, 374 

 catalogue of the polar distances of thirty-nine principal 



stars, with remarks, xiv. 186 



remarks on the parallax of a Lyrae, xvii. 26 4 



Brisbane (Sir Thomas), account of experiments made by, with 



an invariable pendulum, at New South Wales, xvii. 128 

 Brisseau MiRBBL (C. F.), observations of, on cryptogamous 



plants, and agamous vegetation, v. 257-264 

 Bristol Library and Philosophical Institution, foundation and plan 



of, ix. 215, 21G 

 Britain, climate of, deteriorated, iv. 281. Probable cause of 



such deterioration, 2S2 



D 



