LdpU^jd Drum the Origin of 
the Timpanum ufed in the 
Sacrifices of Mater Deorum, 
N, 500. p, ^030 and 2037. 
Leaden Coffin found in a Ro- 
^ man Burying place, N. 2^5 
p.. 1864, 
I^etters firft invented in Swe- 
den, N. 300. p. 2029. 
Light irom Mercury in vacuo, 
R 296. p. 1565, 
X%i6^ from Attrition in vacuo 
■ N, 304. p. 21 65. 
iJJm Tree Bark viewed with 
a Microfcope, N. 298. p. 
1850.^ . 
#De Locis Salidis divinatio 
Geometrica, N. 291; p. 
M. 
::Magnetlcal Experiments of 
.deftroying, altering and 
confounding the Verticity 
in toucht Wires, N. 303^ 
: p. 2x36, &c. 
^^g^g-> Attinus and Atlas the 
fame^ 301. p. 2073. 
Mamfiripts how to judge of 
their Ages, N.300. p.20i2- 
M^rA/e Italian examined, N. 
289. p. 1547. 
mathematicks. Propofitae cur- 
geometricse alias innu- 
ineras longitudine aequales 
invenire, N. 289. p. 1527 
. De Locis folidis Divini- 
tioGeometrica, N.291. 
p. 1607. 
:'De Orbita Planetarum 
Caffiniana N. 293. p. 
1704. 
Aftronomise Cometicas 
Synopfis, N. 297, p. 
1882. 
Doftrine of Combinati- 
ons and the Alterati- 
ons compleated, N. 
299. p. 1961. 
Theorema, &c. de inve*^ 
ftigatione foci diftan- 
tise a fpeculi Vertice, 
- N. 298. p. 1810. 
Mathematical Inftruments 
See Inftruments. 
Viviani's Mathematical 
Works, N. 291. p. 
1607. 
Eclipfes, fee Eclipfes. 
De Medicamentorum operatio- 
nibus Problema,N. 293. p. 
1753- 
Menfa Ifiaca,an account of it^ 
N. 300. p. 2039. 
Mercurjs Caduceus whence, 
N. 301. p. 20^2. 
MercHvial Phorphorus,N»303. 
p* 2129. 
Metalline Steams whether the 
caufe of Storms, N. 298. 
p. 1 941. 
Ml- 
