CONTENTS 



OP THE 



EDINBURGH JOURNAL OF SCIENCE. 



No. III. 



Page 

 Art. I. Observations on the Vision of Impressions on the Retina, in 

 reference to certain supposed Discoveries respecting Vision announ- 

 ced by Mr. Charles Bell. By David Brewstek, LL. D. F. K. S. 

 and Sec. R. S. Ed. &c. - .... 1 



II. An Account of a Plant allied to the Genus Piper. By Francis 



Hamilton, M. D. F. R. S. F. A. S. Loud, and Ed. Communicated 



by the Author, • - - - - 9 



III. On the Theory of the Existence of a Sixth Sense in Fishes ; suppos- 

 ed to reside in certain peculiar Tubular Organs, found immediately 

 under the Integuments of the Head in Sharks and Rays. By Ro. 

 bert Knox, M. D. F. R. S. E. &c. Communicated by the Au- 

 thor, - - - -12 



IV. On the Natural History and Physical Geography of the Districts of 

 the Himalayan Mountains, between the River-Beds of the Jumna 

 and Sutluj. By George Govan, M. D. Communicated by the 

 Author, - . - - - - - 17 



V. Description of the First Steam-Engine. Communicated by the Au- 



thor, ....... 38 



VI. On a Method of Splitting Rocks by Fire. By John MacCclloch, 

 M. D. F. R. S. F. L. S. and M. G. S. Chemist to the Board of Ord- 

 nance, and Professor of Chemistry in Addiscombe College. Com- 

 municated by the Author, .... 44 



VII. An Account of the Frontier between Part of Bengal and the 

 Kingdom of Ava. By Francis Hamilton, M. D. F. R. S. and 



F. A. S. Lond. and Ed. Communicated by the Author, . 48 



VIII. Remarks on the Culture of the Silk Worm in the North of Italy. 

 By John Murray, Esq. F. A. S. F. L. S. M.W.S. Lecturer on 

 Chemistry. Communicated by the Author. 59 



JX. Account of the Specific Gravity of several Minerals. By Wil- 

 liam Haidinger, Esq. F. R. S. E. Communicated by the Au- 

 thor. .... . . -07 



