R EXM^ .R D S 



?r 1 -^.V^^^' 



GENERAL -SCIENCE, 



BY 



ROBERT D. THOMSON, M. D. 



PHYSICIAN TO THE FREE DISPENSARY, BLENHEIM STREET, AND LECTURER ON 

 CHEMISTRY, IN THE BLENHEIM STREET MEDICAL SCHOOL. 



WITH THE ASSISTANCE OF 



THOMAS THOMSON, M.D., F.R.S.L.&E.,F.L.S., F.G.S.,&c. 



REGIUS PROFESSOR OF CHEMISTRY IN THE UNIVERSITY OF GLASGOW. 



VOL. LV. 



LONDON: 



TAYLOR AND WALTON, UPPER GOWER STREET, 



Booksellers and Publishers to the University of London ; and 



SOLD BY MACLACHLAN AND STEWART, EDINBURGH ; JOHN REID AND CO., AND RUTHER- 



GLEN AND CO., GLASGOW ; W. CURRY, JUN., AND CO., AND R0HERTSON AND CO., 



DUBLIN ; KING AND CO., CORK j GRAPEL, LIVERPOOL ; WEBB AND SIMMS, 



MANCHESTER ; AND BARLOW, BIRMINGHAM. 



1836. 



