22 



BULLETIN 537, U. S. DEPARTMENT OF AGRICULTURE. 



Table II. — Results of compression tests of rock complete to Jan. 1, 1917 — Continued. 



VIRGINIA. 



Serial 

 No. 



Locality. 



County. 



Name. 



Crushing 



strength, 

 pounds 



per 



.square 



inch. 



8S04 

 L0344 



6796 

 4900A 

 4900B 

 5923 

 5678 

 5924 

 6615 

 5925 

 5492 

 5920 

 5382 

 53S5 

 5375 

 7217 



Albert 



Lynchburg 



(') 



Broad Run 



do 



Strathmore 



Eggleston (near) 



Boscobel 



Korah Station 



Greenwav 



Nokesville 



Greenlee 



Bluff Water Station. 



....do 



St. Paul 



Burkes Garden 



Bedford 



Campbell 



Dinwiddie 



Fauquier 



do 



Fluvanna 



Giles 



Goochland 



Henrico 



Nelson 



Prince William . 



Rockbridge 



Rockingham 



....do 



Russell 



Tazewell 



Granite gneiss 



Quartzite 



Granite 



Quartz 



Epidosite 



Chlorite epidote schist.. 



Dolomite 



Granite gneiss 



Biotite granite 



Feldspathic quartzite . . 

 Ferruginous sandstone . 



Dolomitic marble 



Limestone 



....do 



....do 



Dolomitic sandstone . . . 



13, 820 

 25, 885 

 13, 150 

 28,400 

 28,000 

 13, 210 

 45, 690 

 13, 550 

 20, 300 

 16, 500 

 17,780 

 36,900 

 21, 450 

 40,850 

 17,600 

 21,500 



WEST VIRGINIA. 



5365 

 5917 

 5918 

 5919 

 7475 

 7476 

 6109 

 9132 

 9133 

 9134 

 5610 

 5612 

 5613 

 5614 

 5615 

 5616 

 8447 



Berkeley 



Renick 



Frazier 



Snow Flace 



Green Spring, east of. 



do 



Spring Hill 



Fairmont 



do 



do 



Sturgisson 



do 



do 



do 



do 



do 



Parkersburg 



Berkeley 



Greenbrier . 



do 



do 



Hampshire.. 



do 



Kanawha . . . 



Marion 



do 



do 



Monongalia . 



do 



do 



do 



do 



do 



Wood 



Limestone 



Crystalline limestone. . 



Limestone 



do 



Siliceous limestone 



Quartzite 



Sandstone 



do 



do 



do 



Siliceous limestone 



Limestone 



Argillaceous limestone . 

 Calcareous sandstone. . 



Impure limestone 



Argillaceous limestone . 

 Feldspathic sandstone. 



23,350 

 21,300 

 17, 450 

 13, 550 

 34, 400 

 15, 050 

 12, 400 

 5,420 

 5,720 

 6,080 

 22, 440 

 17,910 

 14, 300 

 29,840 

 19,650 

 24, 850 

 11,910 



WISCONSIN. 



5523 

 3448 

 11129 

 8656 



Peebles 



Amberg 



Wauwatosa 

 Lannon 



Fond du Lac 

 Marinette . . . 

 Milwaukee . . 

 Waukesha. . . 



Dolomite 



Biotite granite 



Argillaceous dolomite 

 Dolomite 



32, 600 

 20,000 

 45, 310 

 23,020 



i Exact locality not known. 



Table III. — Geographical distribution of rock samples tested to Jan. 1, 1917. 



Alabama 31 



Arizona 3 



Arkansas 17 



California 101 



Colorado 28 



Connecticut 52 



Delaware 30 



Florida 13 



Georgia 256 



Idaho 10 



Illinois 128 



Indiana 179 



Iowa 23 



Kansas 13 



Kentucky 46 



Louisiana 7 



Maine 86 



Maryland 121 



Massachusetts 192 



Michigan 95 



Minnesota 17 



Mississippi 13 



Missouri 39 



Montana 4 



Nebraska 12 



New Hampshire.. 27 



New Jersey 75 



New Mexico 1 



New York 148 



North Carolina. .. 149 



Ohio 165 



Oklahoma 50 



Oregon 14 



Pennsylvania 610 



Rhode Island 41 



South Carolina 30 



South Dakota 15 



Tennessee 77 



Texas 63 



Utah 13 



Vermont 35 



Virginia 424 



Washington 213 



West Virginia 180 



Wisconsin 149 



Wyoming 3 



Canada 52 



Porto Rico 12 



Cuba ' 4 



Total 4,066 



By comparing the results of tests on a sample of rock with the 

 limits as shown in the following table, a general idea of the types of 

 road construction for which it is best suited may be obtained. 



