Auscultation instrument for rendering slight sounds more audible. Amended specification
By: [August Evens]
Contributors: Phillips, Robert E., agent
Edition: Amended.
Publisher: Printed for Her Majesty's Stationery Office by Malcomson & Co., Ltd
Place of publication: Redhill
Language: eng
Notes: Patent specification.

Contains the complete specification.

Patent reference : 1896/17216.