| Description | Dated by postmark. Letter dated 'Thursday noon'
Sticks to his original tenet of communicating conclusions with freedom but conjecture with reluctance. Young seems to take great pains to confirm Wollaston in his pertinacity, by applying strictly to eextreme cases what he meant only as a probable approximation to instances of mean refraction and transferring to one extreme of incidence what Newton gave as a probable approximation to the other extreme, with a view to perfecting telescopes. But as Young prefers extremes, he shall have it in his own way and according to the doctrine which he himself proposes of emanation and attraction - what Wollaston considers as the quetions between them is, in which medium will the angle of dispersion bear the greater ratio to the angle of deviation? Provides his explanation. Includes a diagram.
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