[ 644 ] 
MancljeJler, fupplement to obfervations on the population of it, p. 160. Males to fe- 
males baptized 13 to 12, ibid. Comparative view of the numbers of males and 
females in different places, p. 161. Females exceed the number of males, ibid. 
Comparative view of the number of widowers and widows in different places, p. 
162. Widows are almoft double the number of widowers, ibid. A a enumeration 
of the inhabitants of the town and parifh of Afhton under Line, in 1775, p. 164. 
An enumeration of the inhabitants of Tattenhall, in 1774, p. 165. Chtiftenings 
and burials there, ibid. An enumeration of the inhabitants of Waverton, in 1774, 
p. 166. Chriftenings and burials there, ibid. Inhabitants multiply with great ra- 
pidity, 165—167. 
Majfon (Mr. Francis), his account of three journies from the Cape Town into tha 
fouthern parts of Africa; undertaken for the difcovery of new plants, towards the 
improvement of the royal botanical gardens at ICevv, p. 268. See Africa. 
Mechanic Power, an experimental examination of the quantity and proportion of, ne- 
ceffary to be employed in giving different degrees of velocity to heavy bodies from 
■ a (late of reft, p. 450. Sir Ifaac Newton’s definition of ic, ibid. The truth or 
propriety of his definition difputed, ibid. From equal impelling powers, a&ing for 
equal intervals of time, equal increafes of velocity are acquired by given bodies, 
when unrefifted by a medium, 450, 451. Remarks thereon, p.451,452. Artifts 
and approved writers liable to errors in applying received doffrines to practical me- 
chanics, p. 452 — 458. Definition of the term Mechanical Power, p. 438, 459. De- 
fcription of the machine ufed to determine what proportion or quantity of me- 
chanical power is expended in giving the fame body different degrees of velocity, 
p. 459 — 462. Experiments therewith, p. 463. Definition of the terms Impulfe or 
Impulfion, Impulfive Force or Power, Impelling Force or Power, p.464. Obferva- 
tions and dedu&ions from the preceding experiments, p. 465 — 475. 
Medicines, the beft antifcorbutic ones for fea-voyages, p. 402 — 404. 
Mediterranean, 1719 obfervations on the variation of the compafs, to, in, and from 
there, the Eaft Indies, Guinea, and Weft Indies, with the latitudes and longitudes 
at the time of obfervation, p. 18. See Tables. 
MeJJier (Mr.), extradl of his letter, defcribing a belt on the difc of Saturn, p. 543. 
Metals, condudl eleftrical fluid better than the human body, p. 198. A difference 
in the weight of metals when hot and cold, p. 509 — 512. 
Meteorological lnjlruments, an account of thofe ufed at the Royal Society’s houfe, p. 375. 
Of the thermometers, with refle&ions concerning fome precautions ncceffary to be 
ufed in making experiments with thofe inftruments, and in adjufting their fixed 
points, p. 375 — 381. Of the barometer, rain- gage, wind, and hygrometer, p. 
381 — 385. Of the variation compafs, p. 385 — 395. Of the dipping needle, p. 
395—401. 
Meteorological journal for the year 1775, an ^ P art 1 Ti&> kept al the hemfi-’ oLthij. 
Royal Society, p. 319, &c. See Tables. An abridged Hate of the weather col- 
lect'd therefrom, p. 354, &c. , 
Meteorological 
