ii CONTENTS. 
Art. X. 1. On the Unequal Distribution of Caloric in Voltaic 
Action. 2. On the Temperature of the Skin of the 
Dormouse. 3. On the Temperature of the Egg 
of the Hen, in relation to its Physiology. By John 
Murray, F.S.A. F.L.S. & M.W.S. 
1. On the Unequal Distribution of Caloric in Y oltaic Action, 57 
2. On the Temperature of the Skin of the Dormouse, 60 
3. On the Temperature of the Egg of the Elen, in re- 
lation to its Physiology, - 61 
XI* Remarks on Mr Danielfs Hypothesis of the Radia- 
tion of Heat in the Atmosphere. By Mr F oggo jun. 63 
XII. Sketches of the Comparative Anatomy of the Organs 
of Hearing and Vision. By Thomas Buchanan, 
C. M. Author of the Illustrations of Acoustic Sur- 
gery, &c. &c. 
1. Ear of the Squalus, - - 71 
XIII. On the Constancy of the Level of the Sea in general, 
and of the Baltic Sea in particular, - 77 
XIV. On certain circumstances connected with the Conden- 
sation of Atmospheric Humidity on solid surfaces. 
By Henry Home Blackadder, Esq. Surgeon, 81 
XV. Account of a Case of Poisoning, caused by the 
Honey of the Lecheguana Wasp. By M. Auguste 
de St Hilaire, - - - - 91 
XVI. Sketches of the extent of our information respect- 
ing Rail-roads. By the Rev. James Adamson, 100 
XVII. Table of Magnetic Variations, - - 111 
XVIII. Observations and Experiments on the Structure and 
Functions of the Sponge. By Robert Edmond 
Grant, M.D. F.R.S.E. F.L.S. M.W.S. &c. (Con- 
tinued from Vol. XIII. p. 34*6.) - - 113 
XIX. On the Detection of Boracic Acid in Minerals by the 
Blowpipe. By Edward Turner, M.D. F.R.S.E. 
Lecturer on Chemistry, and Fellow of the Royal 
College of Physicians, Edinburgh, - 124 
XX. On Euclase. By A. Levy, Esq. A. M. &c. - 129 
XXI. On the modes of Notation of Weiss, Mohs, and Haiiy. 
By A. Levy, Esq. A. M. - - 132 
XXII. On the Preservation of Zoological Specimens from 
the Depredations of Insects. By Thomas S- Traill, 
M.D. F.R.S.E. &c. - - - 135 
XXIII. Notice of Zircon found in the primitive Island of 
Scalpay, on the East Coast of Harris. By William 
Nicoll, Esq. Lecturer on Natural Philosophy, 138 
