Proceedings of the American Academy of Arts and Sciences. 

 Vol. XXXVII. iS'o. lU. — Novemukk, lUOl. 



CONTRIBUTIONS FROM THE CHEMICAL LABORATORY 

 OF HARVARD COLLEGE. 



MODIFICATIONS OF HEMPEUS GAS-APPARATUS. 



By Theodore William Richards. 



MARINE BIOLOGICAL LABORATORY. 



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Accession No. /SsS/, 



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Given by '-^^..C:^-<.t^ir^_.,o,c^^^^^ 

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***rlo book ot. pamphlet is to be t-emoved from the Iiab- 

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