CONTENTS. 
On the Separation of Iron from other Metals, Byh 86 
Calculation of the horizontal Refraction in an Atmosphere of 
uniform Temperature, ay is ee edna 
On the Formation of Hail, be he a PS | 
On the Circle, the Sphere, the Square, and the equilateral Tri- 
angle, .. se a oe i se gee 4 
Letter from Rozert Hare, M.D. Professor of Chemistry in 
the University of Pennsylvania, in opposition to the Con- 
jecture that Heat may be Motion, und in favour of the Ex- 
istence of a material Cause of calorific Repulsion, .. 104 
On the Breeding of Eels, : se A ee 109 
On the Use of Phosphoric Acid in Jaundice, .. os WO 
On the Culture of Indian Corn, Bc. .. acon) i 
On the Galvanic Deflagrator of Professor RopErt Hare, M.D. 
of the University of Pennsylvania, .. ee se 113 
On Flame, int he nN “o are AALS 
On setting Cutting Instruments, oe ve SoualklO 
Answer. to the Question addressed to the Rev. J. Groosy, 120 
Observations on the dangerous Rock usually called The Drunken 
Sailor, lying off the Flag-Staff Point, Colombo, Island of 
Ceylon, ont, : ois ea” 121 
Account of an improved Method of planting Vines for Forcing, 
122 
Report from ihe National Vaccine Establishment , ». 124 
On some Compounds of Chrome, wet lle! iat R127 
Description of the Methods employed in determining the Alti- 
tudes of several of the principal Mountains and other re- 
markable Oljects visible from the Trigonometrical Station on 
Rumbles Moor, Yorkshire, .. Se ave 130, 190 
On the Pheory of parallel Lines in Geometry, ..» «» 161 
Further Observations on Mr. Luxson’s Safety Blowpipe Ap- 
pendages, ee ee ee ee ee ee 168 
Description of anew Apparatus proposed for restoring the Action 
of the Lungs in Cases of suspended Respiration, e, 169 
Process for procuring pure Platinum, Palladium, Rhodium, 
Iridium, and Osmium, from the Ores of Platinum, .. 171 
Observations on Mr. Newton’s Articles on Algebra, .. 179 
Remarks on the Apparatus for restoring the Action of the 
Lungs, e 80 
ee ee es -e ee 
