[ I0 99 ] 
Wheel . Account of a newly-invented and very ufeful machine for determining the 
perfeft proportion between different moveables a&ing by levers, and wheel and 
pinion, p. 950—998. 
White , Dr. W. his experiments upon air, and the effects of different kinds of effluvia 
upon it, made at York, p. 194. See Air . 
Wilfon , Mr. Benjamin, his diffent from the report of the committee, appointed by the 
Royal Society, for examining the effeCl of lightning upon the parapet-wall of the 
houfe of the Board of Ordnance at Purfleet, p. 239— -242. An account of his expe- 
riments on the nature and ufe of conductors, addreffed to his Majefly, p. 243, &c. 
See Lightning, Dr. Mufgrave’s reafons for diffenting from the report of the com- 
mittee appointed to conn der of Mr. Wilfon’s experiments j including remarks on 
fome experiments exhibited by Mr. Nairne, p. 801 — 822. Remarks on Mr. Wil- 
fon’s new' experiments and ohfervations on the nature and ufe of conductors, p. 853, 
860. Mr. Wilfon’s new experiments on the Leyden phial, refpeCting the termi- 
nation of conductors, p. 999. See Conduttors. 
Winds, State of them at Fort St. George, in the Eaft Indies, during the months of 
October, November, and December, 1776, p. 182—188. And in January and 
February 1777, P* *88- — 192. An abridged table of the winds, &c. at Briftol, for 
the year 1777, p. 568. State of the winds in London for each month throughout- 
the year 1777, p. 574 — 597- 
Wi<ves, a plurality of them allowed among the Battas in Sumatra, p. 166 . Purchafed 
by the hufband, and all live in the fame houfe, p. 166, 167. See Sumatra . 
Wolckenberg, one of the Seven-bergen, compofed of volcanic fubftances, p. 3. 
Women live longer than men in Chefler, p. 144.. Chefter peculiarly favourable to their 
conftitution, ibid. How the unmarried women are diftinguilhed by their drefa- 
among the Battas in Sumatra, p. i6q. 
Worms . Earth-worms frozen, with a view to fee if they would be jeftored to the aClions 
oflife when thawed, p. 38. 
Wren, his opinion concerning the communicating of motion to bodies, p. 346. 
Writing , the method of, ufed by fome of the inhabitants of Sumatra, p. 164., 
- Y* , . ' 
Tori, Experiments made there upon air,, and the efkCJs of different kinds of effluvia 
upon it, p. 194. See Air. 
' Z. '' 
Zinc t. On the ufe of an amalgam of zinc, for the purpofe of eleClrical excitation, p, 86 
The end op. the Sixty-Eighth Volume, 
