BRIEF ACCOUNT 



OF 



MICROSCOPICAL OBSERVATIONS 



Made in the Months of June, July, and August, 1827, 



ON THE PARTICLES CONTAINED IN THE 

 POLLEN OF PLANTS; 



AND 



ON THE GENERAL EXISTENCE OF ACTIVE 

 MOLECULES 



IN ORGANIC AND INORGANIC BODIES. 



BY 



ROBERT BROWN, 



P.R.S., Hon. M.E.S.E. and E.I. Acad., V.P.L.S., 



MEMBEB OP THE BOTAL ACADEMY OF SCIENCES OP SWEDEN, OP THE EOYAL 



SOCIETY OP DENMAEK, AND OP THE IMPEKIAL ACADEMY NATUR.ffi; 



CUEIOSOEUM ; COEEESPONDINa MEMBEE OP THE BOYAI 



INSTITUTES OF FRANCE AND OP THE NETHEBLANDS, 



OP THE IMPERIAL ACADEMY OP SCIENCES AT 



ST. PETEBSEITEG, AND OP THE EOYAL 



ACADEMIES OP PRUSSIA AND 



BAVABIA, ETC. 



[Not P'iiblvslied.~\ 



