To William Francis   9th Dc 1850

Marburg 9^th Dec 1850

Dear Sir

I send you the paper¹ which Magnus’s memoir has prompted, and hope it will please you. It is a fruitful little subject though at first sight exceedingly barren looking. I cut away some [score] of experiments lest you might think the matter too much diluted.

When you have made up your mind as to the new series² you will perhaps let me know – Is Poggendorff the only Journal from which you make selections?

I will send you Plucker³ in a few days – he is rather an obscure writer and therefore requires a little time.

very sincerely yours | John Tyndall

W^m Francis Esq^re

would you oblige me by having one of the enclosed⁴ dropped in the Leader letter box and the others⁵ in the nearest post office

I have another favour to ask from you, and that is to have 20 or 30 copies of the enclosed⁶ struck off for me. – and shd feel much indebted if you would send one to

Cap^t Wynne | Railway Commiss^rs Office | Whitehall

and another to

Geo Edmondson Esq^re | Queenwood College | Stockbridge | Hants

J.T.

StBPL T&F, Authors’ letters