Vol. VI JULY 31, 1916 No. IS 



RESEARCH 



CONTENTS 



Page 



Life Cycles of the Bacteria ------ 675 



F. LdHNIS and N. R. SMITH 



A Respiration Calorimeter, Partly Automatic, for the Study 

 of Metabolic Activity of Small Magnitude - 703 



C. F. LANGWORTHY and R. D. MELNER 



DEPARTMENT OF AGRICULTURE 



'WASHINGTON , D.C 



WASHINGTON : GOVERNMENT PRINTING OFFICE : 19J4 



