THE IXTERXATIOXAL MILLIOXTH MAP 



131 



DIAGRAM SHOWING ARRANGEMENT OF SHEETS FOR THE INTERNATIONAL MAP ON' 



THE SCALE OF I : 1,000,000 



number. The United States Geological 

 Survey now has in course of prepara- 

 tion nine of these sheets, covering parts 

 of the Eastern. Central, and Western 

 States. The originals are being drawn on 

 a scale of one-five-hundred-thousandth, 

 or 8 miles to the inch, and in such 

 a manner that they ma\- be reproduced 

 by photolithography in a clear and ef- 



fective manner for publication on a scale 

 of 10 miles to the inch. In this form the 

 maps may become immediately available 

 for use by the departments of the gov- 

 ernment or by individual states ; and 

 eventually, as Congress provides the 

 means, they will be engraved and pub- 

 lished on the scale of one million ( 16 

 miles to the inch), with all the details 



