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Letter from Sir thomas Bernard of Wimpole Street, [London] to Samuel Parkes, chemist, 20 Nov 1816. Thanking him for making corrections to Bernard's proposals for the repeal of the salt duties. Autograph, with signature. The blank leaf is endorsed: 'Sir Thos. Bernard, 22d Nov. 1816'.

Letter from Thomas A Cook of Newcastle upon Tyne to H B Jordan, Esq of the Alkali Works, Bristol, 8 Dec 1845. Acknowledging Jordan's letter of 4 Dec 1845. Discussing at length the relative efficiency of stone stills [for manufacturing alkalis] used by Cook [at Walker, Newcastle], by Jordan and by Lee and Co; advising Jordan to visit Lee and Co and copy their stills exactly. Mentioning a Mr Bell's patent, the surprising cheapness of coal, and a meeting of masters [i.e. factory owners] which he was unable to attend. Noting that the returns show an increase of stock.

Autograph, with signature. A note [in Jordan's hand] on page 3 states: 'Ansd. 5 Jany'.