BUREAU OF SOILS. 



205 



Total areas surveyed and mapped in the several States during the fiscal year ended June 

 SO, 1915, arid the areas previously reported— -Continued. 



DETAILED— Continued. 



State. 



Idaho 



Illinois 



Indiana 



Iowa 



Kansas 



Kentucky 



Louisiana 



Maine 



Maryland 



Massachusetts 



Michigan 



Minnesota 



Mississippi 



Missouri 



Montana 



Nebraska 



Nevada 



New Hampshire. 



New Jersey 



New Mexico 



New York 



North Carolina... 



North Dakota 



Ohio 



Oklahoma 



Oregon 



Pennsylvania 



Porto Rico 



Rhode Island 



South Carolina... 



South Dakota 



Tennessee 



Texas 



Utah 



Vermont 



Virginia 



Washington 



West Virginia 



Wisconsin 



Wyoming 



Total. 



Work 

 during 



1915 

 (square 

 miles). 



422 



1,336 



2,728 



463 



100 



717 



460 



372 

 1,044 

 2,409 



292 

 2,659 



555 



1,444 

 2,644 

 2,065 



1,788 

 795 



544 



1,625 



1,953 



140 

 473 

 994 

 1,632 

 349 



40,390 



Work 

 pre- 

 viously 

 reported 

 (square 

 mUes). 



1,281 



6,770 



6,802 



3,078 



8,266 



3,069 



9,819 



939 



4,121 



1,494 



5,015 



3,913 



16,215 



21,500 



590 



6,423 



235 



1,411 



2,522 



596 



13,030 



18,524 



8,064 



5,236 



3,480 



1,965 



11,388 



330 



1,085 



15, 225 



675 



7,342 



20,426 



1,951 



227 



6,784 



5, 843 



10, 730 



10,404 



309 



329, 539 



Total. 



Square 

 miles. 



1,703 



6,770 



8,13S 



5,806 



8,729 



3,169 



10,536 



939 



4,581 



1,494 



5,015 



4,285 



17,859 



23,909 



882 



9,082 



235 



1,411 



3,077 



596 



14,474 



21,168 



10,129 



7,024 



4,275 



1,965 



11,932 



330 



1,085 



16, 850 



675 



7,342 



22.379 



1,951 



367 



7,257 



6,837 



12,362 



10, 753 



309 



369,929 



Acres. 



1,089,920 

 4,332,800 

 5,208,320 

 3,715,840 

 5,586,560 

 2,028,160 

 6,743,040 



600,960 

 2,931,840 



956, 160 



3,209,600 



2,742,400 



11,429,760 



15,301,760 



564,480 

 5,812,480 



150,400 



903,040 

 1,909,280 



381,440 

 9,263,360 

 13,547,520 

 6,482,560 

 4,495,360 

 2,736,000 

 1,257,600 

 7,636,480 



211,200 



694,400 

 10,784,000 



432.000 



4, 698; 880 



14,322,560 



1,248,640 



234,880 

 4,644,480 

 4,375,680 

 7,911,680 

 6,881,920 



197, 760 



236,754,560 



RECONNOISSANCE. 



Alaska 



Arkansas-Missouri . 



California 



Kansas , 



Nebraska 



North Dakota 



Ohio 



Pennsylvania 



South Dakota 



Texas 



Washington , 



Wisconsin 



Total. 



31,768 



5,952 



4,209 



41,929 



58,000 

 7,506 

 39, 960 

 53, 064 

 39, 240 

 41,420 

 41,405 

 41,400 

 92,297 

 13,115 

 6,642 



434,049 



31,768 

 58,000 

 13, 458 

 39,960 

 53,064 

 39,240 

 41,420 

 41,405 

 41,400 

 92, 297 

 13,115 

 10, 851 



475,978 



20,331,520 



37,120,000 



8,613,120 



25,574,400 



33,960,960 



25,113,600 



26,508,800 



26,499,200 



26,496,000 



59,070,080 



8, 393, 600 



6,944,640 



304,625,920 



SOIL CHEMISTRY AND SOIL PHYSICS. 



POTASH. 



Attention has been devoted particularly to the possible develop- 

 ment of a domestic source of potassium salts. Four such sources 

 have been recognized as of sufficient magnitude to meet the com- 



