Comments on geodesical measurements being made in Ireland.
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Comments on geodesical measurements being made in Ireland.
Has been able to destroy a large portion of the color of brown sugar by the use of chlorine. If these hints are of use to TH's friend, TH may convey them.
Comments on GA's work on the solar tables, GA's pending paper on eyepieces, and on the quality of observations made at Greenwich and Paris; GA is intending to repeat the experiment of swinging a pendulum in a mine, and JH believes the Board of Longitude can provide the equipment.
Tells AG that JH is a member of a committee looking for ways of making better glass, so AG should not reveal any secrets to JH. JH provides the names of the leading telescope-makers in London, whom AG may wish to contact.
Thanks for, praises, and comments on WH's 'Systems of Rays' paper. Says WH will have a distinguished career. Mentions other works and hopes to forward them with others he receives to WH.