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8 typed leaves, 210 x 320mm of experimental notes on investigations connected with mould developing cheeses. The paper demonstrates experiments with various moulds/yeasts and the resultant cheese types. Refers to Raulin mixture and Penicillium glaucum. Conclusion is added to show results after 2 years.

•Notebook field notes of Uredinales, 100-209
•Notebook of field notes of Uredinales, 210-248

•Papers re: 1899 Forbes/Ogilvie-Grant Expedition to Socotra filed with "Balfour, I.B." papers under "Socotra”
•Letter, dated 26 november 1892, re; mild climate at Loch Hown Head filed with "Balfour, I.B." papers under “Grant, Ogilvie”

•Miscellaneous letters, papers and newspaper and magazine articles.
•Otto Degener, ‘Flora Hawaiiensis, or New Illustrated Flora of the Hawaiian Islands’

Letters dated 30 November 1898 & 2 December 1898, Re; Socotra for Chairman's address to Royal Society of Edinburgh; filed with "Balfour, I.B." papers under "Socotra" - misc. correspondence folder - Box 1.

1 photograph album showing the range of activities of the Scottish Natural History Society at the end of the 1890s.

2 letters dated 1893 to J.J. Duthie from C.W. Hope; filed with “Balfour, I. Bayley” papers under “Hope, C.W.”

Forestry Commission:
Papers /correspondence re: Dutch Elm Disease, filed in Box “Dutch Elm Disease”, - “Papers 1893 – 1953”
Letter from I.B.Balfour, dated 19 Nov. 1903, to N. Smith; Past Master of the Worshipful Company of Carpenters, regarding 'Forestry'.
Imperial Foretry Institute, Oxford -Papers /correspondence re: Dutch Elm Disease, filed in Box “Dutch Elm Disease" “Papers 1893 – 1953”

•Papers from 1893-1953 (including papers of Dr. Malcolm Wilson)

•Papers/ correspondence re: Dutch Elm Disease filed in Box “Dutch Elm Disease” - “Papers 1893 – 1953”