INDEX. 



A. 



Vol. Fol. 



x\CIDS in theftomach, the Author's opinion refpecting 



their good or ill qualities I. 154 



AIR, the Author's fentiments refpecting condenfed and 



rarified Air II. 1 60 



the Author's method of extrafting Air from diffe- 

 rent fluids II. 307 



ALDER Wood defcribed II. 3 



AMBER, fome pieces prefented to the Author I. 2 1 8 



ANIMALCULES, in the fubftance adhering to the teeth I. 118 



■ in frelh water, defcribed in a letter 



from the Author to Sig. Maghabechi II. 82 



in the bloflbms of fruit trees II. 1 80 



on the young Ihoots of goofeberry and 



currant trees II. 1 gs 



'■ in the fediment in gutters on the roofs 



of houfes II. 207 



ANT, particularly defcribed II. 17 



ASH timber, the nature of it, and its different degrees of 



goodnefs II. 6 



B. 



BARK of Trees, how formed II, 131 



BEECH Timber, its formation II. 2 



A 



