The Microscopy of Drinking Water. Third Edition, Rewritten and Enlarged. With a Chapter on the Use of the Microscope, by John xxi + 409 pages. 6 by 9. 74 figures, 6 full-page plates Vital Statistics. xii +517 pages. 4 by 7. 63 figures. Flexible "Fabrikoid" binding, $4.00 net. BY HENRY BALDWIN WARD AND GEORGE CHANDLER WHIPPLE AND ASSOCIATES Fresh-Water Biology. ix+1111 pages. 6 by 9. 1547 figures. Cloth, $6.00 net. AN INTRODUCTION TO THE SCIENCE BY GEORGE CHANDLER WHIPPLE Professor of Sanitary Engineering in Harvard University FIRST EDITION NEW YORK JOHN WILEY & SONS, INC. LONDON: CHAPMAN & HALL, LIMITED 1919 HB 881 W573 COPYRIGHT, 1919, BY GEORGE CHANDLER WHIPPLE Stanhope Press F. H. GILSON COMPANY BOSTON, U.S. A. |