INDEX 
TO THE 
PHILOSOPHICAL TRANSACTIONS 
FOR THE YEAR 1806. 
A page 
Acetic acid , a solvent for resins, * 129 
Adjustment of circular instruments, - - 428,429 
— — — , by a new method, - - 430 
Alburnous vessels of trees , on the inverted action of, - 293 
Appendices of conic sections, 82 
Armagh , astronomical observations at, - - 453 
Arteries , cylindrical to slow-moving muscles, - - 10 
Astronomical circle , description of, - - 420 
B 
Barks of trees , effects of incisions in, - » 296 
Barometer , marine, observations on, - 239 
— — — — falls by land-wind, rises by sea-breeze, 244 
— - — — - — - prognostications from, - - 265 
Bason , mineral, description o f, - 342 
Binomial theorem, a new demonstration of, - - 305 
Bitumen, not formed artificially, » - - 140 
— — , elastic, scarcely affected by sulphuric acid, - 115 
Brande, Mr. Willi am. Chemical experiments on guaiacum, 89 
camel and the cow, - - - - “373 
Bue'e, M. Memoire sur les quantites imaginaires, - 23 
