i: n ;d ’E x; 
xt^eydtn vial, its plia?nomena defcribtd, p. 
Lloydf Mr. account of Elden-hole in Derbyfliire, p. 251, 
Luc^ Mr. de, has invented a new method of obfervino- the 
elevation of places by means of the Barometer, p. 2^4. 
, • M. 
Mac Bride, his objefUons to the ufe of acids in putrid dif- 
• orders, p.' 339. Examined by Profeffor CrelJ, p. 340, 
34 ^ • * 
Majkeline, Rev. Nevile, his calculations of the Aftronomi- 
cal obfervations in the South Seas, p. 405, 406, &c. 
His improvements of Dollond’s Micrometer, p. 536. 
. Mena, a town in Sicily, pj 97, 98. 
Mejfier, Mr. on a new Comet, p, 104. 
Mercury, its tranfit over the Sun obferved at Cambridge 
New England, p. 51. 
Meteorological obfervations at Ludgvan in Cornwall, for 
1770, p. 195. At Caen ih<Normandy by Mr. Pigott, 
p. 274. 
Micrometer, Dollond’s, improvement and new applications 
P; 53 ^- . 
MiUflrenJis, a coin introduced by Conftantine, p. ^ri. 
, Its weight, p. 513. 515. Its worth, p. 526* 
Mina, worth a hundred drachms, p. 468. 
Mofetes, fee Vapours. 
Mobr, Mr. John Mauritz, obferves the tranfit of Venus 
at Batavia, p, 433. And that of Mercury, p. 435. 
Mole, a new, from North America, defcribed by Mr. 
Barrington, p. 292. 
Monocle, a bivalve infedl mentioned by Linnaeus and 
GeofFroy, p. 231. Defcribed before by Mr. Baker, 
p. 232. A new fpecics of it likewife defcribed, p. 232. 
, A catalogue of the different fpecies hitherto known, 
p. 243 * 
Monro, 
