[Royal Institution embossed letterhead] | Saturday
My dear Miss Barnard
The whistling in Dr Frankland’s lecture was due to the intermittent puffing of a bellows below stairs & applied to keep a fire bright.
Yours truly | John Tyndall
Please cite as “Faraday4733u,” in Ɛpsilon: The Michael Faraday Collection accessed on 26 April 2024, https://epsilon.ac.uk/view/faraday/letters/Faraday4733u