Azimuth and Time-Proof Plate and Scale

2026/010

Watson’s Azimuth and Time-Proof Plate and Scale

1858

Description

Thomson’s Azimuth and Time-Proof Plate and Scale on heavy card. Booklet with blue cover titled Explanations with Examples for the Azimuth and Time-Proof Plate and Scale. Used by mariners and surveyors.

The plate and scale allows the sun’s true azimuth to be read off at a glance for any altitude throughout the day.

Additional information

Acquisition Number

2026/010

Item Type

Short Description

Azimuth and Time-Proof Plate and Scale

Manufactured by

Date of Manufacture

1858

Sub-items

Booklet with "Explanations with Examples"

Supporting Items

None

Makers Number

None

Marks

None

Dimensions (mm)

370 x 235

Donor

Date Donated

March 2026

Materials

Card

Condition

Fair – yellowing

Display Location