C 6i 5 ] 
A N 
1 N D E X 
TO THE 
eightieth VOLUME 
OF THE 
PHILOSOPHICAL TRANSACTIONS. 
A. 
ACCOUNT of the difcovery of a finh and feventh fatellite of the planet Saturn - 
With remarks on the conitraaion of its ring, its atmofphere, its rotation on an axis’ 
and Its fpheroidical figure, p. i. Account of fome luminous arches, p. 32. Other 
accounts of fimilar phenomena, p. 43, 43, 4 6, 47 . Account of the firata and vol- 
canic appearances in the North of Ireland and Weftern Iflands of Scotland, p. 
Account of the trigonometrical operation, whereby the diftance between the meri- 
dians of the Royal Gbfervatories of Greenwich and Paris has been determined p. 
ill. Account of the Tabaiheer, p. 273, Account of the Nardus Indica,’ or 
Spikenard, p. 284. Account of fome extraordinary effeds of lightning n, 2Q , 
Account ot a child with a double head, p. 296. Account of a new compound arid 
menftruum, ufelul in tome technical operations of parting metals, p, 350. 'Account 
of a new procefs tor feparating filver from copper, p, 367. Account of the chrono- 
logical Eras in life among the Siamefe, p. 575. 
fod, diluted nitrous, molybdsna ilowly decoropofed by, p. 318, Molybdama rapidly 
aried upon by concentrated nitrous acid, ib. Nitrous acid acquires a phlo-ulbcated 
quality by the addition of a little fpirit of wine, or by diiliilauon with any irflam- 
mable fubftance, p. 362. No two fubiianccs more frequently in the hands of chemifis 
and 
