Scientific Writings For Popular Audiences:
22.5. Genera of the Plants of the United States Illustrated... Vol. I Boston: James Munroe & Co. 1848; Vol. II New York: George P. Putnam 1849. Plates by Isaac Sprague. from Vol. I; 6 sheets of plates from Vol. II, with Gray's annotations; 1 sheet rough sketches. First Lessons in Botany and Vegetable Physiology ... New York: G.P. Putnam & Co. and Ivison & Phinney, 1857
23. Manuscript draft in Gray's hand; corresponding to pp. 1-12 of printed work, with prints of Sprague's illustrations pasted on.
24. Corrected proof, pp. 1-70; folded printed sheets, some sections annotated, others not. Botany for Young People and Common Schools: How Plants Grow with a Popular Flora. New York: Ivison, Blakeman & Taylor, 1858.
25. Corrected proof sheets for parts of both sections of text.
26. Pages with portions of Popular Flora pasted on, followed by descriptions of families which differ from those published, 56 pp. Possibly intended for an unpublished revision.
26.5. Botany for Young People: How Plants Behave. New York: Ivison, Blakeman, Taylor & Co., 1872. 2 drawings (signed E.B.) and 15 proofs of drawings (some probably by Isaac Sprague)
27. "Do Insects Produce the Flowers upon which they feed": manuscript in Gray's hand, 31 pp. Note indicates it was published in Contemporary Review, April 1882.
28. The Elements of Botany for Beginners and for schools. New York: Ivison, Blakeman & Co., 1887. Manuscript in Gray's hand, with illustrations pasted in, appears to be draft sent to printer, excluding glossary and index. [The book was a revision of First Lessons in Botany.]
28A. 16 drawings for Elements ..., probably by Isaac Sprague. Also 3 drawings that weren't used (appear to be preliminary to one that was used) and 2 proofs of an unidentified drawing.
29. "Cook's Lectures on Biology" -- review of Boston Monday Lectures, Biology, with Preludes on Current Events, by Joseph Cook. Boston: Osgood & Co., 1877, pp. 325. Manuscript in Gray's hand, 36 pp., appears to be draft sent to printer. Published in New Englander XXXVII, 100-113, 1878. Life and Letters of Charles Darwin -- sheets of Francis Darwin's book from which Gray wrote his reviews.
30. Sheets of Vol. I, pp. 1-395: parts cut up, pencil lines in margins. Sheets of Vol. II, pp. 1-355: labeled "1st Rev. in sheet" and stamped as sent out by printer Feb. 5, 1887; has a few annotations and a few pieces cut out.
31. Sheets of title pages of the three volumes and of index, not annotated. Sheets of Vol. II, pp. 1-393, slightly annotated and cut up. Sheets of Vol. III, pp. 1-368, unannotated, apppears not to have been used since most signatures haven't been cut.