14 CONTROL OF THE CHESTNUT BARK DISEASE. 
merely local agents. Back of this line the chestnut trees may be 
abandoned to the disease. Every effort should be made, however, to 
have them cut down and the timber utilized as soon as possible, 
since they remain sources of distant infection as long as any spore- 
laden bark or diseased sprouts remain on them. 
Quarantine.—Whether any restrictions are placed upon the move- 
ment of chestnut products from the area of complete infection to the 
protected territory will depend largely on local conditions and must 
be left to the judgment of State authorities. Barked timber can 
probably be moved with comparative safety. It will always be de- 
sirable to limit the movement of unbarked chestnut timber and fire- 
wood and of chestnut tan bark. An inspection of local conditions 
will readily determine whether the danger from these sources: is 
sufficiently great to warrant the business inconvenience which would 
be caused by the quarantine of any or all chestnut products. 
Program for the second year.—The work for the second year will 
consist mostly of réinspection of the advance spots where the bark 
disease has been eradicated the previous year and of general scouting 
to locate new spots. If the work of the first year has been thoroughly 
done and there has been time to complete the elimination of all spots 
located, only scattering infections may be expected. From this time 
on the persons in charge of scouting will have the bulk of work and 
responsibility. 
THE EXAMPLE OF PENNSYLVANIA. 
Pennsylvania enjoys the distinction of being the first and so far the 
only State to undertake in any way the control of the chestnut bark 
disease. In the summer of 1910 the Main Line Citizens’ Associa- 
tion—an organization of citizens residing along the main line of the 
Pennsylvania Railroad near Philadelphia—appointed a committee of 
seven, under the chairmanship of Mr. Harold Peirce, to determine the 
status of the disease in that locality and to see what could be done 
toward controlling it. An extensive local survey of the disease was 
made under the direction of Mr. I. C. Williams, deputy State forest 
commissioner. The committee soon became convinced that the prob- 
lem was of State and even national importance, and could only be 
solved by legislation and by the broadest cooperation. Accordingly 
they devoted their energies to securing the passage by the Pennsylva- 
nia Legislature of the following bill, which has now become a law. 
This law is almost unique in conservational legislation, and on ac- 
count of its important bearing as precedent for similar laws in other 
States it is here reproduced in full. 
AN ACT To provide efficient and practical means for the prevention, control, and eradica- 
tion of a disease affecting chestnut trees, commonly called the chestnut-tree blight ; pro- 
viding for the destruction of trees so affected; creating a commission to carry out the 
purpose of this act; fixing penalties for violation of the provisions hereof; and making 
an appropriation therefor. 
Suction 1. Be it enacted by the Senate and House of Representatives of the 
Commonwealth of Pennsylvania in General Assembly met; and it is hereby 
467 
