Shelfmark

Wts.10

Maker

W. Watson & Sons; Limited

Subjects

optical (photometer); electrical (galvanometer)

Title

New Selenium Density Meter or Photometer

Description

Includes description of the instrument, and details of calibration, accuracy etc.

Earliest Date

Latest Date

Pages

4

Address

313, High Holborn, London, W.C.1 [England]; High Barnet, Herts. (works)

Other Makers

Cat no

Contents List

Hardback

Prices

Yes

Index

Illustrations

Yes

General Ref