Improvements in apparatus for respiring in foul air
By: [Alexander Bernhard Dräger]
Contributors: Michaelis, Ludwig, inventor; Phillips & Leigh
Publisher: Printed for His Majesty's Stationery Office by Malcomson & Co., Ltd
Place of publication: Redhill
Language: eng
Notes: Patent specification.

Contains the complete specification.

Patent reference : 1901/20558.