Vol. XLVIII January, IQ2$ JVo. I 



BIOLOGICAL BULLETIN 



RESPIRATORY METABOLISM. 

 PHYSIOLOGICAL STUDIES ON RESPIRATORY METABOLISM/ 



JOS LI 'H HALL BODIXE AND PAUL RUDBERT ORR. 

 ZOOLOGICAL LABOHATORV, I :TY OF PENNSYLVANIA. 



INTRODUCTION*. 



Such quantitative knowledge as now exists concerning the fruit 

 fly, Drosopliilti. has been largely obtained from genctieal studies 

 hy Morgan and his students (i). Quantitative physiological 

 mi tl mism, however, have been carried out princi- 



I- Loeb and Xorthrup (2) and more recently by Pearl and 

 These authors have been concerned primarily 

 with studies un tin- duration of life of the organism under normal 

 as wd! ; mental conditions. Inasmuch as no quantitative 



information exist concerning such questions as the physi- 



'etween stocks or >t rains, the physiological dif- 

 fer- exes, etc., it was deemed advisable to study 

 tlic.se que :n some detail. The present paper is one of a 

 ling with certain physiological phenomena such as, first, 

 changes in the oxygen and carbon dioxide content of culture 

 bott dly. the rates of carbon dioxide output; thirdly, the 

 s of oxygen consumption of two different stocks or strains of 

 animals. tl:< .lied ' wild ' and ' vestigial ' types. 



MATERIAL AND METHODS. '-' 



Two different stocks or strains of Drosophilii inclatwgastcr. the 

 so-called "wild" and "vestigial" types, were used in these ex- 



i HiTrdit.iry ' ] s in respiratory metabolism of two stocks of Droso- 



phila. 



- Parts of the data in this paper are taken from a thesis submitted by 

 P. R. O. to the graduate school of the University of Pennsylvania in partial 

 fulfillment i.f the requirements for the degree of Master of Science. 



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