Shelfmark

Bus.15

Maker

Emil Busch Optical Co.; Ltd.

Subjects

optical (lens testing equipment; focometer)

Title

Vertex Focimeter (improved model)

Description

Describes the vertex focimeter, an instrument for testing the focal length of eye-glass lenses. Gives instructions for use.

Earliest Date

1929

Latest Date

1932

Pages

4

Address

37-38 Hatton Garden; London; E.C.1

Other Makers

Cat no

Dr. 137 e

Contents List

Hardback

Prices

Index

Illustrations

Yes

General Ref