I 1Q 7 6 1 
jMleBrical Spark, A read/ way of lighting a candle by a very moderate eleClrica! Tparfc, 
p. 1022. Done by the explofmn of a frnall jar, p. 1022 — 1024. Method of doing it 
in the night, p. 1024, 1025. A piitol loaded with inflammable air frequently fired by 
this means, p. 1025, 1026. 
'Rkftricai explcjions, the efficacy of conductors with {harp and blunt terminations con- 
ildered, p. 155 — 159. 245,. &c. 314 — 317. 801 — 822, 823 — 855. 855—860. 
999 — ioi 1. 
Mieftricity, a mufciilar contraction cured by it, p. 97 — 101. On the ufe of an amal- 
gam of zinc, for the pyrpoie of eleCtrical excitation, p. 86-1. The moll eafy and ef- 
fectual method of clean'fing eleCtrical cylinders, p. 861, 862. 
,Eleflridty, experiments on, being an attempt to fhew the advantage of elevated pointed 
conductors, p. 823. Defcription of the machine and apparatus ufed in the experiments, 
p. 824, 825. Twenty-feven experiments, with oblervations thereon, p. 826 — 855. 
Remarks on Mr. Wilfon’s paper, intituled, New experiments and obfervadons on the 
-nature and ufe of conductors, p. 855 — 860. 
Mleftrophoms., Dr. John Ingenhoufz’s leCture on it, p. 1027. Defcription of this elec- 
trical inftrument, p. 1027, 1028. Great ufe of this machine, p. 1028 — 1031. Con- 
ftant laws obferved in the various motions of eleCtric fluid, p. 1032 — 1036. Expla- 
nation of the moft obvious phenomena of the eieCtrophorus, p. 1036 — 1045. Nature 
of an eleCtrophore explained, p. 1045—1048. Obfervadons and experiments tending 
to confirm Dr. Ingenhoufz’s theory of the eieCtrophorus, and to fhew the imperme- 
ability of glafs to eleCtric fluid, p. 1049 — 1055. 
■Elms, Concerning the fowing of elm feed, p. 558. 
Fnganho, Some account of that ifland and its inhabitants, p. 17 1 — 177.. 
Exoccetus Volitans , or flying-fifh, a defcription of it, p. 791 — 800. 
Exotics , from warmer climates fomedmes killed with the cold, p. 39, 40. 
Expanfion. Concerning the meafure of theexpanfion of folids hy heat, p. 4 r<9- — 55 S* 
Eyes , covering weak ones generally occafiojis fquinting, p. 99. 
F. 
Farr, Dr. Samuel, his extract of a meteorological journal for the year 1777 kept at 
Briftol, p. 567. See Meteorological Journal, 
Females live longer than males, p. 144. 
Fevers , malignant, how produced among the lower rank of people, p. 139, -140. Con- 
cerning the fevers which appeared in Chefter in the year 1774, p. 141, 142. 148. 
How produced in camps, &c. p. 204, 205. An account of a molt dreadful putrid 
fever caufed by the Arabs among the Tufks at Bafibra, p. 215. 
Wire, Defcription of a moft effectual method of fecuring buildings againft fire, p. 884. 
The ^method conftfts of under-flooring, extra-lathing, and inter-fecunng, ibid. Of 
