NEW 3TORK STATE MUSEUM 



of study will be found more convenient than a wall map. The 

 sheets are, however, so planned in the details of 'border, legend, 

 etc., that they can readily be mounted on rollers and formed into 

 a wall map of precisely the same scale as that of the first edition. 



In preparation for the publication of a new edition of the 

 economic and geologic map published in 1895, some preliminary 

 drafts have been made to determine what amount of the avail- 

 able geologic detail could be shown on the scale of 12 miles to 

 the inch, which has been adopted for the new edition. 



To pog i -a p li ic sheets 



In view of the many inquiries received by the state geologist 

 in reference to the topographic maps published by the United 

 States geological survey, it has been thought desirable to pre- 

 pare a brief statement of the conditions of publication and dis- 

 tribution of these maps. 



For the past 18 years the United States geological survey has 

 been engaged in making a topographic survey and map of the 

 United States. In most of the older states this work has been 

 carried on in. cooperation with the respective state governments. 

 In New York the mapping is under the joint supervision of the 

 United States geological survey and the state engineer and sur- 

 veyor, the expense being equally divided between the state and 

 the federal government. The state is entitled to gelatin trans- 

 fers from the plates of the several atlas sheets whenever it de- 

 sires to undertake the printing thereof; but because of the better 

 facilities for this work at Washington, no printing has yet been 

 done by the state. Up to the present time 106 atlas sheets 

 covering about two fifths of New York state have been pub- 

 lished. The accompanying index map (pi. 2) shows the name 

 and location of each of these sheets. 



The unit of map publication is an atlas sheet 16^ inches wide 

 by 20 inches high. Two scales are used. One is 1:62500, or 

 about 1 mile to 1 inch; the other 1:125000, or about 2 miles to 

 1 inch. Maps of all the areas, as surveyed, are published 

 originally on the first-mentioned or mile scale. An atlas sheet 



