In =Astronomy=, Dr. Simon Newcomb’s new book, published October, 1900; in =Physics=, the Johns Hopkins text of Professors Rowland and Ames; also in Physics for second and third year high school work, the text of Dr. Hoadley, of Swarthmore; in =Physiology=, the text by Drs. Macy and Norris, based on the Nervous System; also the =High School Physiology= indorsed by the W. C. T. U., written by Dr. Hewes, of Harvard University; in =Geology=, the =Revised= “=Compend=” of Dr. Le Conte, and the two standard works of Dana,—The =Manual for University Work=, and the =New Text Book=, revision and rewriting of Dr. Rice, for fourth year high school work; in =Chemistry=, the approved =Storer and Lindsay=, recommended for secondary schools by the leading colleges; in =Zoology=, the =Laboratory Manual= of Dr. Needham, of Cornell; and the Series “=Scientific Memoirs=” edited by Dr. Ames, of Johns Hopkins. Nine volumes ready. The publishers cordially invite correspondence. AMERICAN BOOK COMPANY, CINCINNATI ------------------------------------------------------------------------ TRANSCRIBER’S NOTES 1. Silently corrected obvious typographical errors and variations in spelling. 2. Retained archaic, non-standard, and uncertain spellings as printed. 3. Enclosed italics font in _underscores_. 4. Enclosed bold font in =equals=.