INTRODUCTORY 



to use, and whose courtesy and kindness it will always be a pleasure to re- 

 member: to D. Appleton & Co., of New York, whose International Library 

 of Science and Modern Science Series have been of especial service and are to 

 be commended as placing a great amount and variety of admirably selected 

 material within the reach of the American or English reader in his own 

 language ; to the American Book Co. , the Clarendon Press, the Columbia 

 University Press, Wm. O. Allison, A. L. Burt, Dodd, Mead & Co., 

 Doubleday, Page & Co., Fords, Howard & Hulbert, Harper & Broth- 

 ers, Henry Holt & Co., the Humboldt Publishing Co., Longmans, Green 

 & Co., James Pott & Co., G. P. Putnam's Sons, Charles Scribner's Sons, 

 Sheldon & Co., John Wiley & Sons, and Wm. Wood & Co., of New 

 York; to Ginn & Co., Houghton, Mifflin & Co , and Little, Brown & 

 Co., of Boston; to the American Baptist Publication Society, the Henry 

 Altemus Co., and J. B. Lippincott & Co., of Philadelphia; to the Schulte 

 Publishing Co., of Chicago; to A. & C. Black, Bell & Sons, Chapman & 

 Hall, J. M. Dent & Co., Harper & Brothers, Kegan Paul, Trench, Triibner 

 & Co. , Swan, Sonnenschein & Co. , of London. Individual favors and cour- 

 tesies more than can be here enumerated, but all of which are gratefully re- 

 membered, have aided in the preparation of the work. 



JAMES C. FERNALD. 



