PUBLICATIONS 79 



of the parks and are sold at twenty-five cents a copy. They 

 are based on accurate surveys and average in size about 

 18 X 20 inches, the scale being from one to three miles to the 

 inch. They are printed in four colors. 



Reports and Proceedings. The annual report of the Di- 

 rector does not differ essentially from that of the ordinary 

 executive. It is a complete summary of the work of the Serv- 

 ice during the fiscal year. It is free. At present the reports 

 for 1918, 1919, 1920, and 1921 are available for distribution. 

 The Proceedings of the four 'National Park Conferences are 

 on sale at from fifteen cents to twenty-five cents a volume. 



