JOSIAH P. COOKE, Jr., ERVING PROFESSOR OF CHEMISTRY AND MINERALOGY NEW YORK: D. APPLETON AND COMPANY, 549 & 551 BROADWAY. 1874. ENTERED, according to Act of Congress, in the year 1873, by D. APPLETON & CO., In the Office of the Librarian of Congress, at Washington. TO JOHN A. LOWELL, LL.D., DEAR SIR: BOSTON, MASSACHUSETTS. From the early lectures of the Lowell Institute I derived, when a boy, my taste for the science which became the occupation of my after-life, and it has since often been my privilege to illustrate before the intelligent audiences—which, for more than thirty winters, the Institute has gathered under your direction-the results of the studies that I there began. Allow me, then, to dedicate to you this volume, as an expression of my indebtedness to the foundation you have so long and so ably administered. With great respect, Your obedient servant, JOSIAH P. COOKE, Jr. |