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Notes and material relating to O. T. Jones's study of the proposed use of water power in Wales, in particular in connection with the river Rheidol, 1917-18. Including a printed account of O. T. Jones's statement to Aberystwyth Borough Council concerning the probable power to be derived from the river Rheidol, 1918; printed copies of the report on the Plynlimmon water scheme, 1884, and the Aberystwyth Borough Council Engineer's reports, 1914; typescript and off-print of an article by O. T. Jones 'The development of rural industries' [not in Bibl., source not named]; letters, or copies of letters, relating to the Rheidol scheme from David Davies, MP, H. J. Fleure, Sir E. D. Jones, H. J. Mackinder, MP, Principal T. F. Roberts, and Lleufer Thomas, all 1917; and report 'the probable flow of water in the river Rheidol', with copy of a covering letter to H. J. Mackinder and a letter concerning the report from Herbert Lapworth, all 1918.

Notes and material compiled by O. T. Jones while working on the Memoir [cf. MS 36]. Because on many points these notes give fuller information and more detail than the memoir and because the sources from which they derive may not in all cases be readily traced, the contents of these MSS have been fairly fully described. The relatively well ordered material has been gathered into MSS 37 and 38, which have been bound. [cf. also Portfolio A, nos 1 - 7.].

These MSS were donated to the National Library in 1968 by Dr W. D. V. Jones, son of the late Prof. Jones (1878-1967). They came to the National Library via the librarian of the Sedgwick Museum, Cambridge, where they had lain since Prof. Jones retired from the Woodwardian Chair in 1943, with the comment that they were 'the residue of things he [OTJ] did not wish to remove'. It will be understood therefore that these papers represent, in general, activities and interests of Prof. Jones that he left behind, or had left behind, in 1943. Reference will be made below (in the form: Bibl., year of publication) to the bibliography appended to the memoir of OTJ by W. J. Pugh, published in Biographical memoirs of Fellows of the Royal Society, vol. 13, Nov. 1967. Arranged into student notes (MSS 1-4), university lecture courses, Aberystwyth and Manchester (MSS 5-10), university lecture courses, Cambridge (MSS 11-18), occasional lectures, addresses (MSS 19-29), research material (MSS 30-70), personal papers and correspondence (MSS 71-82), miscellaneous (MSS 82-92), supplement to list (1970) (MS 93), and additional donation (2000) (MSS 94-100). Unless otherwise indicated, it should be assumed that all items are in the hand of O. T. Jones.

MS and typescript drafts, with original drawings for plates, of the article on the geology of the Colwyn Bay district [Bibl., 1939].

MS and typescript (10pp.) of 'An historical review of geological investigation in central Wales' [c.1920]. Seems to be intended for publication but does not appear in Bibl. Covers, at greater length, the same ground as pp. 1-2 of O. T. Jones's Memoir [cf. MS 36].

Loose notes and material relating to the Memoir. Includes original drawings and tracings used for plates in the vol.; notes concerning the composition of the vol.; lists of travelling expenses while engaged on the work; disorganised notes, largely statistical; newspaper cuttings and some miscellaneous material relating to lead mines; a 1" O. S. map of the Aberystwyth district on which O. T. Jones has superimposed the mines given on Absalom Francis's map of 1878.

Large photographs: five showing geological features on Akpatock Island, Canada; three of Robson Peak, Canada; two of the Hitchin 'lake bed'; three general views of the Alps; and one unidentified studio portrait.

Folder mostly containing papers relating to the Stonehenge blue stones, including an incomplete work entitled 'A follow up to the Blue Stone Story'; a photocopy of a letter dated 1966; together with a letter dated 1955, relating to the stone from Bowles Barrow.

Folder containing papers regarding the history of the Teifi river and weir and its ownership, presumably in connection with the use of the water by an iron and tinplate company, including letters and research notes, 1958-1959. Also included in the folder is a paper under the title 'Statement - rainfall of north Cardiganshire', [c.1916]; typed article by O. T. Jones, 'The Characteristics of some Lower Palaeozoic Marine Sediments', reprinted from Proceedings of the Royal Society, 1954.

Folder containing a copy of what appears to be an essay under the title 'Central Wales'; another set of notes, also relating to Central Wales and to Edale in Derbyshire; notes concerning geological matters in Wales - 'Sedgwick's Journals' is written at the top of one of the pages suggesting that the notes are taken from the journals of Adam Sedgwick of Cambridge University, written c.1831, whilst on a trip in Wales (cf. MSS 32 and 35).

File of rough notes and material on the geology of Central Wales [c. 1911-15] and draft of article on the Dovey estuary, with relating letters [cf. Bibl., 1916].

File of papers relating to the Sub-committee on Soil Surveys, Agricultural Research Council, 1935-42.

File of papers relating to silicosis, 1930-41.