LETT ER OF SUBMITTAL. 
U. S. DEPARTMENT OF AGRICULTURE, 
Drviston oF VEGETABLE PHYSIOLOGY AND PATHOLOGY, 
Washington, D. C., September 28, 1900. 
Dear Sir: In continuation of the cooperative work of this Division 
and the Division of Soils, I hand you herewith a paper prepared by 
Dr. Oscar Loew, on catalase, a new enzym of general occurrence, with 
special reference to the tobacco plant. The paper is the result of inves- 
tigations carried on in connection with the tobacco work in your charge. 
I regret very much to state that this will be the last of the series of 
important papers by Dr. Loew which will be brought out in coopera- 
tion with your Division, as he has just accepted a position in the Impe- 
rial University at Tokyo, Japan. | 
Respectfully, 
B. T. GauLoway, 
: Chief of Division. 
Prof. Mitton WHITNEY, 
Chief Division of Soils, 
Ln charge of Tobacco Investigations. 
