CONTENTS. vii 
C. dtc: 
PART II. 
Page 
XV. On the Action of Voltaic Electricity on Alcohol, Ether, and 
Aqueous Solutions. By Artuur ConneELL, Esq. F.R.S.E. 315 
XVI. On the Expansion of different kinds of Stone from an increase 
_ & Temperature, with a description of the Pyrometer used 
in making the Experiments. By ALEXANDER J. ADIE, 
Civil Engineer, 2 2 “CLE = ped 
XVII. On the application of the Hot Blast, in the Manufacture of 
Cast-Iron. By Toomas Criarx, M.D., Professor of Che- 
mistry in Marischall College, Aberdeen, - Seco 
XVIII. On the Poisonous Properties of Hemlock, and its Alkaloid 
Conia. By Rosert Curistison, M.D., F.R.S.E., Pro- 
fessor of Materia Medica in the University of Edinburgh, 383 
XIX. Account of the Invention of the Pantograph, and a Descrip- 
tion of the Eidograph, a Copying Instrument invented by 
Witiram Watiace, A.M., F.R.S.Edin. F.R. A.S., Memb. 
Cam. Phil. Soc., &c. Professor of Mathematics in the 
University of Edinburgh, - - - - 418 
XX. Some Observations on Atmospheric Electricity. By Joun 
Davy, M.D. F.R.S. Communicated by Professor Forprs, 440 
XXI. Researches on Heat. Second Series. By James D. Forzss, 
Esq. F.R.SS. L. & E. Professor of Natural Philosophy in 
the University of Edinburgh, - - - 446 
XXII. On Single and Correct Vision by means of Double and In- 
verted Images of the Retine. By W. P. Autson, M.D. 
F.R.S.E. Professor of the Institutes of Medicine in the 
University of Edinburgh, > - - - 472 
