Improvements in apparatus for respiring in foul air / [Alexander Bernhard Dräger].

  • Dräger, Alexander Bernhard.
Date:
1901
Catalogue details

Licence: Public Domain Mark

Credit: Improvements in apparatus for respiring in foul air / [Alexander Bernhard Dräger]. Source: Wellcome Collection.

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    A.D. 1901. Oct. 14. N.°. 20,558. DKAGrER & another's Complete Specification. (l SHEET) Mai by <5cSons. Photo-LtSo. This Draninq ts a reproduction,of the Oriqmal onci reduced scale]