Analysis of Ayscough's Telescope Adapted to Use at Sea

TL;DR

This paper examines the adaptation of Ayscough's telescope for maritime use by analyzing historical lens descriptions and testimonies from 1765 to understand its optical design and effectiveness at sea.

Contribution

It provides a detailed comparison of Ayscough's telescope lens with a historical compound lens, revealing their optical similarities and historical context.

Findings

Confirmed optical correspondence between Ayscough's and Eastland's lenses.

Analyzed historical testimonies to understand lens design and usage.

Provided insights into 18th-century maritime optical instruments.

Abstract

An unambiguous accordance between an objective lens for Ayscough's telescope 'Adapted to Use at Sea' and another compound lens which was described by William Eastland in well-known Quere during the trial in October of 1765 was revealed. Preliminary analysis of small fragments of Quere from Eastland', Stedman' and Champneys' testimonies was carried.