Lensfield Cottage Cambridge | 19 Novr 1861
My dear Dr. Tyndall,
I was employing my leisure time to finish an investigation relating to a paper of Balfour Stewart’s,1 about which I have written to him, or I would have sooner replied to you.
According to what appears to me to be most probable I think that you are justified in supposing that the equality of cooling points to a doubly quick circulation in the air of half density. However I have not yet sufficiently closely considered the thing. I will write to you again2 or speak about it when we meet.
Yours very truly | G.G. Stokes
RI MS JT/1/S/225
Please cite as “Tyndall1829,” in Ɛpsilon: The John Tyndall Collection accessed on