102 



Nova Acta Pbysico-Medica Academiee Caesareae Leopoldlno-Caro- 

 linse Naturae Curiosorum. Vol. xvii. part 1 By the Aca- 

 demy. 



Quarterly Journal of Agriculture ; and Prize Essays and Transac- 

 tions of the Highland and Agricultural Society of Scotland ; 

 for June, September, and December, 1835 By the So- 

 ciety. 



A Treatise on Poisons, in relation to Medical Jurisprudence, Phy- 

 siology, and the Practice of Physic. By Robert Christison, 

 M. D,, F. R. S. E., Professor of Materia Medica in the Uni- 

 versity of Edinburgh, &c. &c. — By the Author. 



Annual Report of the Council of the Yorkshire Philosophical So- 

 ciety, for 1 834 — By the Society. 



Report of the Directors of the Manchester Mechanics Institution, 

 and Proceedings at the Annual Meeting of the Members, 

 held on 26th February 1835. 



Catalogue of the Library of the Manchester Mechanics Institution, 

 witli the Rules, and a Sketch of the Objects and Advan- 

 tages of the Institution. — By the Institution. 



Journal of the Bahama Society for the Diffusion of Knowledge. 

 May 1835. No. 1 — By the Society. 



Annual Reports of the Leeds Philosophical and Literary Society for 

 1833-4 and 1834-5 By the Society. 



Maps of the Ordnance Survey of Great Britain, published by the 

 Board of Ordnance. Nos. 1, 2, 13, 34, 35, 36, 37, 41, 42, 

 43, 44, 45, 46, 47, 48, 53, 54, 55, 56, 57, 58, 61,62, 64, 65, 

 69, 70, 73, 83, 84, 85, 86.— By the Board of Ordnaiice. 



The following Communications were read : — 



1. On the Poisonous Properties of Hemlock, and its lately 

 discovered alkaloid, Conia. By Dr Christison. 



The author commenced by stating, that he had repeated the 

 greater part of the analysis of hemlock lately executed by Profes- 

 sor Geiger of Heidelberg, and had obtained precisely the same re- 

 sults. According to his analysis, hemlock contains a peculiar prin- 

 ciple, alkaloidal in its nature, but differing from the previously disco- 

 vered alkaloids in its form, which is that of an oily-like liquid, vo- 

 latile at a moderate elevation of temperature, and capable of being 

 readily distilled over with water. It neutralizes acids, without 

 however forming crystallizable salts. It contains a considerable 



