f 333 ] 
Vijion, an attempt to explain a difficulty in the theory of, p. 2 $ 6 , Experiment 
illuftrating the theory of vifion, p. 261. 
Vitriol, oil of, in its moft dephlogifticated date, con fids of a proper faturation of the 
acid with phlogifton, p. 289. 
Volatile vitriolic acid contains the proper element of depblogUlicated air, p. 292, 
Volta s opinion, that a point in electricity is the coating to an infinitely fmall plate of 
air, erroneous, p. 281., 
Wo 
Walker , Richard, on the congelation of quickfilver in England, p. 199. 
Waring , Dr. on the method of correfpondent values, &c, p. 166. On the refolution of 
attractive powers, p. 185. 
Water , the decompofnion of, by means of iron, a fallacy, p, 17. A great want of 
water on the clofe of the year 1788 univerfally felt, p. 37. 
Wolf* See Letter » • 
\ 
FROM THE PRESS OF JOHN" NICHOLS. 
