364 BOTANICAL GAZETTE [april 



out into the surrounding cytoplasm. It would seem, therefore, 

 that in the absence of a better explanation^ the reaction chamber 

 hypothesis might serve a useful purpose. 



Summary 



The respiration of Laminaria after death may be considerably 

 greater than in its normal condition. This is the case when it is 

 killed by alcohol, acetone, formaldehyde, and ethyl bromide, as 

 well as by drying and by other methods. 



Laboratory of Plant Physiology 

 Harvard University 



LITERATURE CITED 



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 Biedermann's Zentralbl. Agrik. Chem. 37:168. 1908. 



2. Batelli, F., and Stern, L., Einfluss der mechanischen Zerstorung der 

 Zellstruktur auf die verschiedenen Oxydationsprozesse im Tiergewebe. 

 Biochem. Zeit. 67:443. 1914 (see literature quoted). 



3. Brenstein, G., Producktion von CO2 durch getotete Pflanzentheile. 

 Dissert. Rostock. 1887. 



4. BucHNER, E., BucHNER, H., and Hahn, M., Die Zymasegarung. Berlin. 

 1903. 



5. Czapek, F., Biochemie der Pflanzen. 2:400!?. 1905. 



6. Detmer, W., tJber physiologische Oxydation im Protoplasma der Pflanzen- 

 zellen. Bot. Zeit. 46:41. 1888. 



7. Haas, A. R., A simple and rapid method of studying respiration by the 

 detection of exceedingly minute quantities of carbon dioxide. Science 

 N.S. 44:105. 1916. 



8. JoHANNSEN, W., tJber Fortdauer der "Athmungs Oxydation" nach dem 

 Tode. Bot. Zeit. 45:762. 1887. 



9. Kastle, J. H., U.S. Pub. Health and Mar. Hosp. Service. Bull. 51. 

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10. KosTYTSCHEFF, S., tJber Atmungsenzyme der Schimmelpilze. Ber. 

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11. LoEB, J., and Wasteneys, H., The influence of hypertonic solution upon 

 the rate of oxidations in fertilized and imfertilized eggs. Jour. Biol. Chem. 

 14:469. 1913. 



5 The explanation suggested by Warburg (21), that the oxidizing substances 

 are bound up by the structure, seems too vague for discussion. 



