Title
A.l.s. to C H Kerry from W H Preece
Reference
UK0108 NAEST 020/066
Date
1873-05-31
Scope and Content
A.l.s. to Mr C H Kerry from W H Preece. Requests Kerry to test a double-wound relay on a duplex system. With manuscript reply from Kerry dated 11 June 1873, giving results of tests. Includes diagram of equipment used and results from ordinary relay and double relay.
Physical description
Number of pieces: 1, Pages/folios: 2
Language
English.
Persons keyword
Kerry C H
Subject
Telegraph equipment
Conditions governing access
Open
Level of description
file