[ 5 01 ] 
may be (hewn to be a very good argument in its favour, p. 28 r. Poftibility of a foltrr 
motion (hewn by Dr. Wilfon, and inferred by Mr. De la Lande, p. 283. 
T. 
T 'able s. See Mineral Acids , Eudiometer , Solar Spots , Sic a and Solar Syjlen- 
\ Telefcopes . See Fye-glcjfes. 
\ Tentbredro of Hill, See Black Canker Caterpillar, 
‘Thermometer , See Rain, 
Thorefy, See Lunar Iris. 
f I' 6 rnJlen , M. John. See fuichfilver . 
Tranfit of Mercury. ExtraCt of a letter from the E.ev. James Auguftus Hamilton, giving 
an account of his obfervation of the Tranfit of Mercury over the Sun, of 12 Nov. 
1782, obferved at Cook’s-Town, near Dungannon in Ireland, p. 453. State of Mr. 
Hamilton’s general apparatus, ibid. Apparent time by the clock at, and after the 
ingrefs of Mercury, p.444. Time of the fir ft external and internal contaCt, ibid. 
Longitude and latitude of the place of obfervation, p. 455. 
Tunftally Marmaduke, Efq. See Lunar Iris. 
V. 
Volcanos , advantages of, p. ii. See earthquakes. 
W. 
TVadd. See Black Wadd. 
Water , is capable of being cooled conftderably below the freezing point, without conge- 
lation taking place, p. 31 1. Reafon of the long interval between its beginning t* 
freeze and being entirely frozen, p. 312. 
Wedgwood, Jofiah. See Black Wadd. 
Wenzel , Mr. his method of afeertaining the quantity and force of attractive powers, p, 
37. It^ defeCls, ibid. 
Wilfon , Dr. Alexander. See Solar Spots , Sun and Solar Syfem. 
Wire. See Lightning. 
Z. 
Zeikcr , Dr. See Ehtickflver. 
FROM THE PRESS OF J. NICHOLS* 
