I 683 ] 
looked for when it appears next, p. 83. Note on this fubje& by the Aftronomer 
Royal, p. 84. 
Conductors. Account of an anticondudlor, p. 454. Its advantages for exhibiting ex- 
periments analogous to the natural effects of lightning from the clouds, p. 453, 
Experiments to lhew the advantages of pointed over blunt conductors, p. 46. 
Cork in Ireland, latitude of, p. 165. 167. 1S0, 181. Its longitude, p. 167. Its lon- 
gitude farther fettled from obfervations at Cork, and at the Royal Obfervatory, 
p. 179. 
Cow-calf. Account of a fpecies of, called the Free martin, p.285. 
Crotch , William, the mulical child, account of him, p. 187. 
Cryftal . Partly changed into felenitical fpar, p. 12. The change owing to the lead ore 
which adheres to it, p. 14. How known from other fubftances with a fparry 
appearance, p. 27. 
Curves. Demonltration of them fuited to the purpofes of optics, recommended to 
mathematicians, p. 425. 
Cuthlerfon , Mr. Eledtrical apparatus, with a double plate, contrived by, p. 663. Its 
amazing powers, p. 663. 
Cuypers , Mr. His improvements in the double-plate eledlrical machine, p. 665, . 
Cynocephalus . See Orang Qutang. 
D. 
Dipping. See "Needle . 
Dropfy. Extraordinary one, from a difeafe in the left ovary, p. ,57. Woman tapped 
155 times, and 465 gallons of water taken from her, p. 58, 
E* 
Earth. Problem to determine how much each particle of it is afFedled by the unequal 
adtion of the fun, p. 510. 
Eclipfe . Total, with duration, and annular of the fun, obferved on the 24th of 
June, 1778, p. 104. Obfervation of the luminous annulus furrounding the dilk 
of the moon, p, 106. This laft appearance owing to the lunar atmofphere, p. nr. 
Point of the fun’s difk feen before its limb began to emerge, p. 113. Solar fpots 
feen during this eclipfe, p. 117. Eclipfe of the fun obferved at Cork, p. 178. 
Eddies and whirlpools, what they proceed from, p. 607. 
1 Edwards, Mr. Miftake of. his in the reprefentation of the Orang Outang, p. 146. 
E le fir i city* 
f 
