CO-OPERATION NECESSARY. 



It is believed that by carefully following the foregoing instruc- 

 tions the disease can be kept under control in Massachusetts, 

 with the constant hope that some natural enemy will appear to 

 assist in the work. No controlling enemy, however, is known at 

 present. All persons are therefore urged to do their utmost, 

 either by reporting cases to this office or by actively using some 

 of the above measures of control, to aid in checking this enemy 

 of one of our best timber trees. 



BIBLIOGRAPHY. 



Reference is made to the publications of the United States 

 Department of Agriculture on this subject, especially Bulletin 

 141, Part V., of the Bureau of Plant Industry, from which 

 several extracts, including quoted passages in this pamphlet, have 

 been taken (those who are interested are advised to obtain a copy 

 of this bulletin) ; also to a report of the Main Line Citizens' 

 Association of Haverford, Pa. 



CONCLUSION. 



Lest the serious results of this disease be underestimated, the 

 following instances of its work in other localities are cited : 



" A survey of the Forest Park, Brooklyn, showed ' that 16,695 chest- 

 nut trees were killed in the 350 acres of woodland in this park alone. 

 Of this number, about 9,000 were between 8 and 12 inches in diameter, 

 and the remaining 7,000 or more were of larger size.' " 



" In a recent publication Dr. W. A. Murrill estimates the financial 

 loss from this disease ' in and about New York City ' at ' between five 

 and ten million dollars/ " 



With this loss in a city it can readily be seen what an enor- 

 mous loss would occur should the disease become prevalent in the 

 woodlands. 



It becomes a question, therefore, as to which is the better 

 economy, to do nothing, and lose our chestnut trees, or to do 

 our utmost at this early stage, with a fair chance of saving them. 



