CONTENTS. Vll 



PART II. 



Page 



XV. On the Action of Voltaic Electricity on Alcohol, Ether, and 



Aqueous Solutions. By Arthur Connell, Esq. F.R.S.E. 315 



XVI. On the Expansion of different kinds of Stone from an increase 

 of Temperature, with a description of the Pyrometer used 

 in making the Experiments. By Alexander J. Adie, 

 Civil Engineer, _____ 354 



XVII. On the application of the Hoi Blast, in the Manufacture of 

 Cast-Iron. By Thomas Clark, M.D., Professor of Che- 

 mistry in Marischall College, Aberdeen, - - 373 



XVIII. On the Poisonous Properties of Hemlock, and its Alkaloid 

 Conia. By Robert Ciiristison, 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 

 William Wallace, 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 John 



Davy, M. D. F. R. S. Communicated by Professor Forbes, 440 



XXI. Researches on Heat. Second Series. By James D. Forbes, 

 Esq. F. R. SS. L. & E. Professor of Natural Philosophy in 

 the University of Edinburgh, - 440 



XXII. On Single and Correct Vision by means of Double and In- 

 verted Images of the Retince. By W. P. Alison, M.D. 

 F.R.S.E. Professor of the Institutes of Medicine in the 

 University of Edinburgh, - 472 



Jb 



