426 



Table 667. 



ACCELERATION OF GRAVITY {g) IN THE UNITED STATES. 



The following table is abridged from one for 219 stations given on pp. 50 to 32, Special Publication No. 40, U. S. 

 Coast and Geodetic Survey.' Tlie observed values depend on relative determinations and on adopted value of 980.112 

 for Washington (Coast and Geodetic Survey Office, see footnote, Table 566). There are also given terms necessary 

 in reducing the theoretical value (Table 565) to the proper elevation (free-air) and to allow for topography and isostatic 

 compensation by the Hayford method (see introductory note to Table 566). 



To a certain extent, the greater the bulk of material below any station, the less its average density. This phenomenon 

 is known as isostatic compensation. The depth below sea-level to which this compensation extends is about g6 km. 

 Below this depth any mass element is subject to equal (fluid) pressure from all directions. 



Station. 



Key West, Fla 



New Orleans, La 



Austin, Tex. university 



El Paso, Tex 



Yuma, Ariz 



Charleston, S. C 



Birmingham, Ala 



Arkansas City, Ark 



Atlanta. Ga. capitol 



Beaufort, N. C 



Little Rock, Ark 



Memphis, Tenn 



Charlotte, N. C 



Las Vegas, N. Mex 



Knoxville, Tenn 



Grand Canyon, Ariz 



Cloudland, Tenn 



Mount Hamilton, Cal., Obs'y 



Richmond, Va 



San Francisco, Cal 



St. Louis, Mo., university.. . . 



Pike's Peak, Col 



Colorado Springs, Col 



Washington, D. C, Bur. St'ds 



Wallace, Kans 



Green River, Utah 



Cincinnati, Ohio, obs'y 



Baltimore, Md., university. . . 



Terre Haute, Ind 



Denver, Co!., university obs'y 

 Philadelphia, Pa., university. 



Wheeling, W. Va 



Princeton, N. J 



Pittsburg, Pa 



Salt Lake City, Utah 



New York, N. Y., university. 



Winnemucca, Nev 



Cleveland, Ohio 



Chicago, 111., university 



Worcester, Mass 



Cambridge, Mass. observatory 

 Ithaca, N. Y., university. 



Fort Dodge, Iowa 



Grand Rapids, Mich 



Madison, Wis., university. . . . 



Boise, Idaho 



Mitchell, S. Dak. university. . 



Lancaster, N. H 



Grand Canyon, Wyo 



Minneapolis, Minn 



Calais, Me 



Miles City, Mont 



Seattle, Wash, university . 

 Pembina, N. Dak 



Latitude. 



24° 33-6' 

 29 57° 

 17.2 

 46.3 

 43-3 

 47.2 

 30.8 

 36.5 

 45 -o 

 43-1 

 4S.O 



13.8 

 35.8 

 57-7 

 5.3 

 6.2 

 20.4 

 32.2 

 47-5 



38 38.0 

 38 SO. 3 

 38 50.7 

 38 S6.3 

 38 54-7 

 59.4 

 8.3 

 17.8 

 28.7 

 40.6 

 57-1 

 4.0 



21.0 

 27.4 

 46.1 

 48. 5 

 58.4 

 30.4 

 47-4 

 16. s 

 22.8 

 27. 1 

 30.8 

 s8.o 

 4.6 

 37-2 

 41.8 

 29-5 

 43-3 

 58.7 



48 S8 



24. 2 

 39-6 



Longitude. 



90 



97 



106 



114 



79 



76 

 92 

 go 

 80 



los 

 83 



112 

 82 



121 

 77 



122 

 90 



los 



104 

 77 



101 



no 

 84 

 76 

 87 



104 

 75 



III 



73 



117 



81 



87 



71 



71 



76 



94 



8S 



89 



116 



98 



71 



110 



93 



67 



los 



122 



97 



48. 

 4- 

 44. 

 29. 

 37- 

 S6. 



23-3 

 39-8 

 16.4 



33 

 50.8 

 12. r 

 55- 



6,8 



7-9 

 38.6 

 26.1 

 25.7 

 12.2 



2.0 

 49.0 



4.0 

 35.4 



9.9 

 25-3 

 37-3 

 23.8 

 56.9 

 II. 7 

 43-4 

 39- S 



0.6 

 53.8 

 S7-7 

 43.8 

 36.6 

 36.1 

 48. 5 



7.8 

 29.0 

 11.4 

 40.8 

 24.0 

 12.3 



1.8 

 34-3 

 29.7 

 13.9 

 16.9 

 50. 



18,3 



14.9 



Eleva- 

 tion, 

 meters. 



1146 



54 



6 



179 



44 

 324 



228 

 i960 



1890 



1282 



30 



114 



154 



4293 



1841 



103 



1005 



1243 



245 



30 



151 



1638 



16 



20s 



64 



235 



1322 



38 



1311 



210 



182 



170 



14 



247 



340 



236 



270 



821 



408 



261 



2386 



256 



38 



718 



S8 



243 



Observed 

 S 



cm/sec2 



978,970 

 979.324 

 979.283 

 979,124 

 979 529 

 979.546 

 979.536 

 979,600 

 979- 524 

 979.729 

 979.721 

 979.740 

 979.727 

 979.204 

 979.712 

 979-463 

 979-383 

 979.660 

 979.960 

 979.965 

 980.001 

 978.954 

 979.490 

 980.09s 

 979-755 

 979.636 

 980 . 004 

 980.097 

 980.072 

 979.609 

 980. ig6 

 980.08s 

 980.178 

 980.118 

 979.803 

 980. 267 

 979.844 

 980. 241 

 980.278 

 980.324 

 980.398 

 980.300 

 980.311 

 980.372 

 980.36s 

 980.212 

 980.37s 

 980.486 

 979.899 

 980.597 

 980.631 

 980.539 

 980.733 

 980.917 



Correction. 



Elevation, 

 cm/sec2 



0,000 



— .001 

 -.058 



— •354 



— .017 



— .002 

 -•OSS 



— .014 



— .100 



— .000 



— .027 



— .025 



— .070 



— -60s 

 -.086 

 — . 262 

 --S83 



— •396 



— .009 



— •03s 

 -.048 



-1.325 

 -.568 



— .032 

 -.310 

 -.384 



— .076 



— .009 



— .047 

 -.505 

 -.005 



— .063 



— .020 

 -•073 

 -.408 



— .012 

 -.404 



— .065 

 -.056 



— .052 



— .004 



— .076 

 -.105 

 -.073 

 -.083 



— .253 



— .126 



— .081 

 -•736 

 -.079 

 -+-.012 

 — . 222 

 -.018 

 ^.075 



Topographj 

 and com- 

 pensation, 

 cm/sec^ 



+0.03S 

 + ■013 



— .001 

 -f-.ooi 



— .010 

 + .016 



-j-.OII 



+.005 

 + •014 

 + •036 



-|-.oor 



-|-,002 



+ .015 

 + •017 



— .001 



— .096 

 + •130 



-t-.I20 

 -j-.OIO 



+ .04S 



-f.OOI 



+•187 



— ,007 



-|-.OI2 



.000 



-.043 



-t-.002 



-i-.oo6 

 -j-.ooi 

 -.015 

 -I-.009 



— .003 

 + •013 



.000 



— .041 

 + .011 



— .004 

 .000 



+ ■007 

 -f.oi8 



4". 010 



+ .OOS 



-J-.002 



+ .003 

 + 003 



— .042 



— .006 



+ •007 



+.038 



— .005 



-j-.OIO 



— .020 



— .020 



— .009 



Smithsonian Tables. 



