INDEX. 
Pessulus , a peculiar bone so named in the ear of the marmot 
and Guinea-pig, - - - 
Pi got t, Edward, Esq. An investigation of all the changes 
of the variable star in Sobieski’s Shield, from five years ob- 
servations, exhibiting its proportional illuminated parts, and 
its irregularities of rotation ; with conjectures respecting un- 
enlightened heavenly bodies, - 
Platiua , on the fusion of it, - 
• precipitated by green sulphate of iron, under what cir- 
cumstances, - 
how to be united most advantageously with mercury, 
Page 
204 
other methods, 
131 
109 
117 
120 
123 , 8cc. 
R 
Repulsion, apparent of floating bodies, - - - 7 8 
Richter , remarks upon his attempts to combine platina with 
mercury, - - - - - - 111 
Ritter's galvanic arrangement of metals and alloys, - 113 
Rose and Gehlen , Messrs, attempt to form palladium, - 106 
Roots , their mode of growth, 99 
s 
Sap , aqueous, from high incisions sweeter and heavier than 
from low incisions, - - - - >91 
true, concerning the state in which it is deposited during 
winter, - - - - - - 88 
Saturn , on the singular figure of that planet, - - 272 
Standert, Mr. Hugh Chudleigh. A description of mal- 
formation in the heart of an infant, - - - 228 
Slap es, the physiology of, - - - - 1 9 8 
the bone described, - - - - 201 
Star, on the magnitude of that lately discovered by Mr. 
Harding, - - - - - 31 , 55 
variable in Sobieski’s Shield, - 1 3 1 
Steel, experiments on that called wootz, - - 163 
Sulphur-alcohol of Lampadius, - - - - 115 
Sun, on the direction and velocity of its motion, - 233 
Tannin, on a substance which resembles it, - - 211 
properties of that substance, - 215 
formed by action of nitric acid on carbonaceous substances, 215 
whether animal, vegetable, 
or mineral, - - - - - - 217 
