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Sierra Club Bulletin 



amend the penal laws of the United States," approved March fourth, 

 nineteen hundred and nine, as amended by section six of the Act of 

 June twenty-fifth, nineteen hundred and ten (Thirty-sixth United States 

 Statutes at Large, page eight hundred and fifty-seven). He may 

 also, upon terms and conditions to be fixed by him, sell or dispose of 

 timber in those cases where in his judgment the cutting of such timber 

 is required in order to control the attacks of insects or diseases or other- 

 wise conserve the scenery or the natural or historic objects in any such 

 park, monument, or reservation. He may also provide in his discretion 

 for the destruction of such animals and of such plant life as may be 

 detrimental to the use of any of said parks, monuments, or reservations. 

 He may also grant privileges, leases, and permits for the use of land for 

 the accommodation of visitors in the various parks, monuments, or other 

 reservations herein provided for, but for periods not exceeding twenty 

 years; and no natural curiosities, wonders, or objects of interest shall 

 be leased, rented, or granted to anyone on such terms as to interfere 

 with free access to them by the public: Provided, however, That the 

 Secretary of the Interior may, under such rules and regulations and on 

 such terms as he may prescribe, grant the privilege to graze live-stock 

 within any national park, monument, or reservation herein referred to 

 when in his judgment such use is not detrimental to the primary pur- 

 pose for which such park, monument, or reservation was created, except 

 that this provision shall not apply to the Yellowstone National Park. 



Sec, 4. That nothing in this Act contained shall affect or modify the 

 provisions of the Act approved February fifteenth, nineteen hundred and 

 one, entitled "An Act relating to rights of way through certain parks, 

 reservations, and other public lands." 



Approved, August 25, 1916. 



Report of Assistant to the Secretary of the Interior on Progress in 



THE Development of National Parks for 1916 

 The report of Honorable Stephen T. Mather, Assistant to the Secretary 

 of the Interior, covering the National Park situation for the past year 

 should be read by everyone who wishes to keep in touch with the won- 

 derful development which has been going on in the national parks under 

 Mr. Mather's able supervision. For the benefit of the members of the 

 Sierra Club, the following abstract of this report is made. This report 

 is addressed to the Secretary of the Interior, Honorable Franklin K. 

 Lane. Mr. Mather states at the outset that Mr. Lane had in mind the 

 fact that the scenic features of this country were unsurpassed, and that 

 American tourist travel should be induced to visit these parks not only 

 during the great war, but after its conclusion. In order to accomplish 

 this purpose, accommodations for visitors with both large and small in- 

 comes should be provided and means of travel to the parks and through 

 the parks perfected. Mr. Mather was authorized to begin the develop- 



