An extract from a letter of the Rev. Mr. John Hellins, formerly assistant to Mr. (now Dr.) Maskelyne, the Astronomer-Royal at Greenwich Observatory, to Francis Maseres, Esq. Dated Potter's Pury, near Stoney Stratford, in Buckinghamshire, Sept. 25, 1792.
Hellins, John,-1827.
[London,
1792]
Drop-head title.
Letter concerns Thomas Mudge's chronometer.
The publication was arranged by Francis Maseres.
ESTC