Improvements in apparatus for producing a sleep-giving or appeasing sound / [Per Erik Fahlberg].

  • Fahlberg, Per Erik.
Date:
1895
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Credit

Improvements in apparatus for producing a sleep-giving or appeasing sound / [Per Erik Fahlberg]. Public Domain Mark. Source: Wellcome Collection.

About this work

Publication/Creation

Redhill : Printed for Her Majesty's Stationery Office by Darling and Son, Ltd, 1895.

Physical description

3 pages, 1 folded leaf of plates : illustrations

Contributors

References note

Patent reference : 1894/23022

Notes

Patent specification
Contains the complete specification

Type/Technique

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Where to find it

  • LocationStatusAccess
    Closed stores
    1894.23022

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