index. 
Enquiry into the meafure of the Roman Foot — Page 774 
Euphorbium , extraordinary cafe of a lady who 1 wallowed 
r 002 
iome — — 
Experiments on feveral pieces of marble trained by Mr. 
Robert Chambers — — , *T 3° 
. — — . concerning the encauflic painting or the an- 
cients — •— . 4 ^ 
. letter concerning the luccefs of the preceding 
53 
on under (hot water-wheels — no — 124 
. . on overfhot D° — I2 7 *3^ 
on windmill-fails ■ “ *4* 
} account ot fome relating to the prefeivation 
of feeds - - _ 2 9 6 
on the tourmalin — — 3°^ 339 
.. in eledricity 3°^» 34 ^j 5 i 4> 896 
- in magnetifm — 4°° 
on the Bovey coal — — 55 2 > 9.4 1 
Explanation of the modes or tones in the antient Grecian 
Explication of fome words which occur in the Reife Befc hrei- 
b un cr — — - — 494 
Eyles Stiles (Sir Fr. Hajkins ) his explanation of the modes 
or tones in the ancient Grecian mufic 95 
Ferentm, a town of Etruria, account of the ruins thereof 
203 
Fiery meteor , feveral accounts of one which appeared on 
Sunday November 26 , 175 ^ 21 
— , its velocity — — 2{ ?3 
its magnitude — — l y td ‘ 
great light yeilded by it . — — • *btd. 
? length and confidence of its tail ibid- 
Fiery meteors] conjectures on their height and fubflance 
- on their formation — 268 
Fires (fubterraneous) the probable caufe of eai thquakcs, ^9 
5 
