HERZBERG GERHARD: (1904-1999) German-Canadian physicist and physical chemist, Nobel Prize winner for Chemistry, 1971. T.L.S., Gerhard Herzberg, one page, 4to, Ottawa, 24^th April 1987, to Wolfgang Windhausen, on the printed stationery of the Herzberg Institute of Astrophysics at the National Research Council of Canada. Herzberg thanks his correspondent for their letter and for the clippings from the Gottingen Tageblatt and continues 'I do not normally send handwritten manuscripts since most of them are written in pencil and not suitable for any collection but also because there are so many requests of this sort. However, your letter was written in such generous terms that I am making an exception and I am sending you a handwritten set of lecture notes for a lecture at Johns Hopkins University, a lecture that was recently published and I am sending you a reprint of the published version also'. Together with the autograph manuscript referred to, three pages, 4to, n.p., 14^th June 1984. The manuscript notes are headed Rowland Gratings, Molecular Hydrogen, and Space Astronomy, and include Herzberg's introduction, notes on Molecular Oxygen, Molecular Hydrogen and Applications in Astronomy. With Herzberg's pencil annotations in the left margin relating to the slide presentations, and also signed by Herzberg to the upper corner of the first page, incorrectly dated April 1887 in his hand. Also including an unsigned printed copy of the final lecture, with diagrams and illustrations, as originally published in Vistas in Astronomy (Vol. 29, 1986). The manuscript lecture notes are stapled together in the upper left corner. VG, 3