|Title||Paper, containing figures of telescopes with explanations by an anonymous author|
Adrian Auzout's report of some astronomical observations, using an instrument which could divide a foot into 24,000 or 30,000, in 'Philosophical Transactions' vol. 1, no. 21 (January 1667) triggered a letter from Richard Towneley in Lancashire claiming priority for William Gascoigne (c. 1620-1644). Gascoigne had applied a micrometer in the optical path of a telescope for measuring small angles by 1639. His micrometers came into the hands of Richard Towneley (whose uncle Christopher Towneley had been Gascoigne’s patron), who claimed to have improved on the instrument, though the details of the improvement are unclear. Robert Hooke substituted the solid sights with hair sights. Towneley’s letter was printed in 'Transactions', vol. 1, no. 21 (May 1667) and the figures of the instrument, drawn by Robert Hooke, in 'Transactions', vol. 2, no. 29 (November 1667).
|Related material||DOI: 10.1098/rstl.1666.0044|
|Related records in the catalogue||CLP/2/13/1|
Fellows associated with this archive
|NA2328||Auzout; Adrian (1622 - 1691); physician and astronomer||1622 - 1691|
|NA8242||Hooke; Robert (1635 - 1703); natural philosopher||1635 - 1703|