Page:Philosophical Transactions - Volume 054.pdf/22

 number of authors have written on this subject, than I was aware of; so that, in all probability, we have not made any new discoveries. I enclose to you the result of our enquiry; and the few obvious reflexions which occurred. If they appear to contain any thing worthy notice, you will please to communicate them to the Royal Society. I am,

Dear Sir,

Your most obedient and

Obliged humble Servant,

John Hadley.

Rh