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There is an original bundle wrapper on which has been written: ' Sundry papers on Steam & Steam Engines, mostly of the date 1803. Drafts of letters to Messrs. La Place & Prony'.
The bundle comprises:
1. Printed account of James Watt's improvements to the steam engine, delivered to the members of the House of Commons, 1774-1775.(1 item)
2. Copy press letter. James Watt (Birmingham) to Erasmus Darwin (--). 31 Jan. 1791. (1 item) Enclosing: Copy press account of the history of the steam engine, by James Watt.
3. Printed account by Thomas Wilson : 'A Comparative Statement of the Effects of Messrs. Boulton and Watt's Steam Engines with Newcomen's and Mr Hormblower's.' 1792.( 1 item)
4. Draft history of the steam engine by James Watt (Heathfield) to [--]. Jan. 1803. (1 item)
5. Draft letter. James Watt (--) to Senateur La Place (--). 22 Feb. 1803. (1 item) Docket reads : Letter written or proposed to be written to Mr la Place in 1803 in answer to his queries respecting Steam & Steam Engines, see letter book for that year for what was written.
6. Letter. Mr Prony) (--) to [James Watt] (--). 20 Brumaire, An 11. In French. [10 Nov. 1803] (1 item) Docket reads : Various questions relative to steam & steam engines.
7. Draft and copy press copy of part of letter from James Watt to Mr Prony. 1803. (1 item)
8. Draft history of rotative motion and the steam engine. 10 Nov. 1808. (1 item) Includes drawings. Docket reads: History of Rotative & double Engines. 1808. Parallel motion - Arthur Wolfe.
9. First draft of the History of James Watt's steam engine. 1813. (1 item)
10. Draft letter. James Watt (London; 4 Norfolk Street) to H.T.Ellicombe (--). 11 Jun. 1815.
11. Copy press account of 'Annotations upon Mr W's argument ' [about the steam engine]. n.d. (1 item)
12. Draft of article by James Watt on steam (incomplete). n.d. (1 item)
13. Note from John Southern (Soho) to James Watt (--). n.d. [1803] accompanying various papers about his experiments made in 1796 on the elasticity of steam. Including:
14. 'Copy of results of old experiments on the elasticity of steam',1772, folded with ' Schmidt's table of the elasticities of steam interpolated by Kirwan.'n.d.
15. 'Account of Mr Southern's Experiments on steam made 1796, communicated to JW in 1803.'
16. ' Mr Southern's Exp[eriment]s on Steam.' 12 Apr. 1803.
17. ' Calculations by Mr Southern on J. Watt's first experiments upon the heats of water boiling under various pressures. The calculations made 1803.'
18. ' Imperfect table of comparison of various experiments on elasticity of Steam, made out 1803.'
19. ' An attempt to find the series which elasticities of steam follow. 1803.'
20. ' Copy of results of Mr Southern's experiments on the elasticity of steam & on Latent heat, made out from the books at Soho, 1803.'
21. ' Considerations upon the power of steam to produce Earthquakes by Mr Southern, 1803.'
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