(396)
that he may draw up a Stone, or a Roll of Sheet-Lead, or any other such Weight to the Top of an House with a Tackle of Five (because this would seem feasible from mechanical Principles) will find himself mistaken on account of the Friction, which will not be surmounted without an additional Force of fifty Pounds.
FINIS.
ERRATA.
PAG. 154. l. 24. and p.356. 1. penult. read, They may be either of Metal, or Glass Plates foiled having their two Surfaces, &c. Transact. Numb. 410. p.142. l. 20. perterriti. P. 143. l. 15. Ventriculo. l. 18. disjici. P. 148. l. 3. significari. l. II. Phænomeno. P. 151. l. ult. Lond. pro Leg.
LONDON:
Printed for W. Innys and R. Manby, at the West-End of St. Paul's Church-Yard.
MDCCXXXIII.
