Monday
My dear Heins
It is not at all necessary for you to come to London on the anniversary2—of course we shd be glad to see you, but it would cost you time and money, so therefore I could not advise you to come.
I feel perfectly satisfied that any mode of experiment which seems satisfactory to you as regards the determination of the loss by scent in the case of the onion3 would appear equally so to me —
Perhaps as I have made the experiment with the potato it would be as well to do it in the way I suggested.4
Yours in great haste | John Tyndall
RI MS JT/1/T/341
RI MS JT/1/TYP/7/2399
[4 November 1861]: This letter follows letter 1820. The most likely date is Monday 4 November.
on the anniversary: the Anniversary Meeting of the Royal Society on 30 November each year. Debus had been elected FRS in June.
determination of the loss by scent in the case of the onion: see letter 1817 and 1820 for Tyndall’s commentary on his experiments with the scent of an onion.
the way I suggested: see letter 1820.
Please cite as “Tyndall1823,” in Ɛpsilon: The John Tyndall Collection accessed on