Box | Folder		Title
		Series 3: Heidelberger Notebooks, 1904-1928 [series]: This series contains notebooks kept by Heidelberger for classes in high school, at Columbia University and at the Rockefeller Institute. In addition, there is a travel diary of Europe (1924), and a notebook entitled "Analyses, etc. M.H. I" dated March 1927-May 1928.
32	31	Ethical Culture School, Experiments in Chemistry, 1904-1905
32	32	Chemistry 141-2, Organic, c. 1909
32	33	Chemistry 142, 1909
33	1	Chemistry 143-144, Organic Conferences, c. 1909-1910
33	2	European scrap book, 1911
33	3	[Lab notebook], Nov. 1915-May 1916
33	4	[Lab notebook], Oct. 1916-June 1917
33	5	[Travel diary of Europe], 1924
33	6	Analysis etc., M.H. I, Mar. 1927-May 1928