E QU 
EVA 
Tranf. 
An account of an apparatus applied to the equa- 
torial instrument for correcting the errors arif 
ing from the refraCtion in altitude Dollond LXIX 332 
Equilibrium. An account of an experiment ex- 
plaining a mechanical paradox, viz. that two 
bodies of equal weight, fufpended on a certain 
fort of balances, do not lofe their equilibrium 
by being removed one farther from, the other 
nearer to, the center - Defaguliers XXXVII [ 2 5 
Equinoxes. A treatife on the preceffion of the equi- 
noxes, and in general on the motion of the 
nodes, and the alteration of the inclination of 
the orbit of a planet to the ecliptic Silvabelle XLVIII 385 
Efifay on the preceffion of the equinoxes, and 
the nutation of the earth’s axis JValmeJley XLIX 704 
. — — A theory of the irregularities that may be occa 
fioned in the annual motion of the earth by the 
aCtions of Jupiter and Saturn JValmeJley — 737 
On the preceffion of the equinoxes produced by 
the fun’s attraction - Milner LXIX 505 
Equuleus. An account of the equuleus /^VjXXXVI 231 
Eratosthenes. Kcctxhw e^xtoo-^vovc, or the fieve of 
Eratoflhenes; being an account of his method 
of finding out the prime numbers Horjley LXII 327 
Ergot. An account of the difeafe called Ergot in 
French, from its fuppofed caufe, viz. vitiated 
rye - - Tijfot LV 106 
Eriocaulon. A letter on a rare plant found in the 
Ifle of Skye, fuppofed to be the eriocaulon de- 
cangulare - - Hope LIX 241 
Ess-ay Instrument. A new-invented eflay-inftru- 
ment deferibed, with its ufes - Boyle X 329 
ExtraCt of a letter relating to the efTay-inftru- 
ment - - “ 353 
Etruscan. See 'Coin, Inscription. 
Evacuation. A new trocart for the punCture in the 
hydrocephalus, and for other evacuations which 
are neceflary to be made at different times 
Le Cat XLVII 267 
Evaporation. A diflertation on the nature of eva- 
poration, and feveral phenomena of air, water, 
and boiling liquors - Hamilton LV 146 
— Obfervations on the annual evaporation at Li- 
verpool in Lancafhire; and on evaporation 
confidered as a teft of the moifture or drynefs of 
the atmofphere - Dobfon LXVII J 244 
173 
Abridg. 
VI 310 
VII 4 
I316 
- 320 
7 
Euclid. 
