Weld Taylor.
7. Conduit Street West, Bayswater.
Sir W. Newton's Process.—Will Sir W. Newton be kind enough, through the mediums of "N. & Q.," to give the rationale of the action of the common soda and powdered allum mentioned in his process published in Vol. vii., p. 140. and why the soda is used for negatives and the allum for positives, both being produced on iodized paper?
Should these chemicals destroy the power of the hyposulphite of soda, I imagine the fading of positives will no longer be a matter of uneasiness; and I am sure all amateurs will be greatly indebted to him.
W. Adrian Delferier.
40. Sloane Square.
Replies to Minor Queries.
A Race for Canterbury (Vol. vii., p. 158.).—In a copy of the tract before me (4to., 1747) is a plate prefixed to the title, containing a view of Lambeth Palace with four bishops, each in a wherry, striving hard to reach the coveted God: Sherlock, Herring, Mawson, and Gibson, designated in the poem as Codex. The contention for the see of Canterbury, on the death of Archbishop Potter, was the subject of several squibs and satirical prints.
I have two other plates, each representing three bishops in wherries; one with three stanzas under it, commencing: