Royal Institution, Saturday
My dear Heins
Excuse me for not having written to you before but I have been dreadfully busy and indeed I overlooked your question2 about the books of the Royal Society.
As Fellow3 you are entitled to the loan of the books of the library, and also entitled to give a note to a friend so that he also may borrow the books.
Write therefore to Walter White Esqr Assistant Secretary and he I doubt not will send the books to you at once.
Do not buy a Magneto-electric machine—you can illustrate the subject without it. You can make small coils and use the coils of your magnet. With a good sized galvanometer you can thus render the phenomena of induced currents visible to a large audience.
If you have lots of money buy a Magneto electric machine, but if you have not lots buy something else.
Yours ever | John Tyndall
RI MS JT/5/11/1365
LT Transcript Only
[June 1861]: It is assumed this letter follows the election of Debus as Fellow of the Royal Society (see n. 3).
overlooked your question: letter missing
As Fellow: Debus was elected FRS on 6 June 1861. See letter 1779 in which Tyndall notes that the Royal Society had formally recommended Debus’s election at a Council meeting on 18 April 1861.
Please cite as “Tyndall1794,” in Ɛpsilon: The John Tyndall Collection accessed on