BRIEF ACCOUNT 



OF 



MICROSCOPICAL OBSERVATIONS 



Made in the Months of June, Juli/, and Artgust, 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, 



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



MEMBER OF THE ROYAL ACADEMY OF SCIENCES OF SWEDEN, OF THE ROYAL 



SOCIETY OF DENMARK, AND OF THE IMPERIAL ACADEMY NATURJ2 



CURIOSORFM; CORRESPONDING MEMBER OF THE ROYAL 



INSTITUTES OF FRANCE AND OF THE NETHERLANDS, 



OF THE IMPERIAL ACADEMY OP SCIENCES AT 



ST. PETERSBURG, AND OF THE ROYAL 



ACADEMIES OF PRUSSIA AND 



BAVARIA, ETC. 



[Not ruhUshed.] 



