To William Francis1

Dear Sir.

I send you the 2nd part of Clausius.2 and with it a ‘notice’ on an experiment of Thomsons which appears in Pogg No. 9.3

I introduced the word ‘not’ with a query in the translation of the 1st part.4 in the errata which accompanies the 2nd part this error is also noticed – The ? and the ( ) may therefore be omitted.

At the bottom of page 505 he speaks of the ‘Nebenannahme’ – I have now translated this ‘incidental assumption’, would you be kind enough to introduce the same expression in the 1st part, as the mind will be led thereby to connect both at once.

In the first part I fear I have introduced ‘steam’ inadvertently in some places where the vapour of water would be better as the former suggests the notion of the boiling point being already attained while no such limitation is made by Clausius. Could it not be altered? –

In the ‘notice’ you will perhaps be kind enough to make the necessary references to the Phil. Mag.5

I shall now commence Plückers memoir6 and hope to be able to send it to you soon.

yours most truly | John Tyndall

StBPL T&F, Authors’ letters

[26 December 1850]: dated by Tyndall’s Journal entry for 2–6 December 1850 where he states ‘all Clausius is away’ (JT/2/13b/518).

2nd part of Clausius: published as R. Clausius, ‘On the Moving Force of Heat, and the Laws regarding the Nature of Heat itself which are deducible therefrom’, Phil. Mag., 2:9 (August 1851), pp. 102–19. See letter 0452, n. 4 for the original paper.

notice . . . Pogg. No. 9: R. Clausius, ‘Notiz über den Einfluss des Druckes auf das Gefrieren der Flüssigkeiten’, Poggend. Annal., 81:9 (1850), pp. 168-72. This followed (and replied to) W. Thomson, ‘Die Wirkung des Drucks, den Gefrierpunkt des Wassers zu erniedrigen, experimentell bewiesen’, Poggend. Annal., 81:9 (1850), pp. 163–8. The translation of Clausius’s note was published in the Phil. Mag. as R. Clausius, ‘On the Influence of Pressure upon the Freezing of Fluids’, Phil. Mag., 2:14 (1851), pp. 548–50.

translation of the 1st part: cited letter 0454, n. 1.

references to the Phil. Mag.: Thomson’s note in Poggendorff (n. 3) had been translated from W. Thomson, ‘The Effect of Pressure in Lowering the Freezing-Point of Water’, Phil. Mag., 37:248 (August 1850), pp. 123–7. Francis included the reference as suggested.

Plückers memoir: cited letter 0448, n. 9.

Please cite as “Tyndall0455,” in Ɛpsilon: The John Tyndall Collection accessed on 30 April 2024, https://epsilon.ac.uk/view/tyndall/letters/Tyndall0455