An improved method of making the opening for the evacuation cap in double-walled glass Dewar vessels.

Title: 
An improved method of making the opening for the evacuation cap in double-walled glass Dewar vessels.
Author/Artist: 
Stephens, Arthur John.
Publisher: 
London : HMSO, 1925.
Description: 
2 p., 1 folded leaf : ill. ; 27 cm.
Other Authors: 
Siegheim, Fritz.
Great Britain. Patent Office.
Format of Material: 
Patents
Bib ID: 
91300
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Location: 
Secured Stacks - Patents
Call Number: 
No call number available
Holdings Note: 
Currently located in Tracy's office
Notes: 
Patent specification.
Patent no. 239,775, accepted September 17, 1925.
Date of application in the U.K.: February 9, 1925, no. 3650/25.
Stamped "Bibliotheek, Bur. Ind. Eigendom, 23 Oct.1925."
Stamped "Openbaar gemaakt den: 8 Oct.1925."