ACKNOWLEDGMENTS 



The author wishes to take this opportunity to thank 

 those who have so kindly aided him in the carrying out 

 of this work. 



The author enjoyed the privileges of the Samuel 

 Anthony Goldsehmidt Fellowship in Chemistry for the 

 year 1912-13, and is sincerely grateful for the aid and 

 support thus provided. 



The problem was suggested by Professor Milton C. 

 Whitaker, and the author is deeply indebted to him 

 for providing special apparatus and for offering valu- 

 able suggestions, criticisms and encouragement. To 

 Dr. Otto Kress, the author is grateful for many favors. 

 Sincere thanks are due to Mr. T. W. Pritchard, of the 

 National Wood Products Co., Inc., Wilmington, N.C., 

 and to Mr. J. A. Kimberly, of the Union Bag and Paper 

 Co., Hudson Falls, N.Y., for donating the raw materials 

 used in these investigations. Dr. L. F. Hawley, of the 

 firm of Arthur D. Little, Inc., Boston, Mass., has lent 

 very material aid by his critical review of the first 

 manuscript. 



J. S. B. 

 Laboratory of Irifliyslrial send Eki$&i3ering Chemistry, 



Columbia* University '' 

 June, 1913*. : : :/:;: 



