GRAVITY MEASUREMENTS. 
53 
H x being approximately estimated from a contour map for 
the country within an arbitrarily adopted radius of 100 
miles of each station and the surface densities taken for d. 
The resulting corrections are shown in the following Table 
D, together with the residuals,^ observed minus g computed, 
under the head of Faye’s reduction, when this compensation 
correction was applied together with the elevation and topo¬ 
graphical corrections. For comparison the residuals are 
repeated from Table C for the two methods of reduction 
there given. 
Table D. 
Station. 
Appalachian (and ad¬ 
jacent) • 
Ithaca.. 
Charlottesville. 
Deer Park... 
Sums. 
Central plains: 
Colorado Springs... 
Denver. 
Sums 
Elevation. 
I'ltf 
Meters. 
345 
341 
479 
2,258 
2,212 
Meters 
247 
166 
770 
1,841 
1,638 
> ® i 
* <*>1 
©“ 
o.S II 
G C rf* 
© G 
||l 
Meters. 
+ 98 
+ 175 
— 291 
+ 417 
+ 574 
eZj -4_> 
Z/G col'# 
G g cn 
O § <M 
‘-tJ O 
u. 
2o 
Dynes. 
+.010 
+.019 
—.029 
+.041 
+.056 
Residuals, 
1 observed — g computed. 
Dynes. 
—.029 
—.019 
—.005 
.053 
+.003 
+.000 
.003 
Dynes. 
—.039 
—.038 
+.024 
.101 
.038 
.056 
.094 
Dynes. 
—.063 
—.056 
—.053 
.172 
.221 
.215 
.436 
Rocky mountains: 
Pikes Peak... 
Gunnison. 
Grand Junction. 
Green River. 
Grand Canyon. 
Norris Geyser Basin...., 
Lower Geyser Basin...., 
Pleasant Valley. 
Salt Lake City.. 
2,258 
2,724 
2,251 
2,112 
2.137 
2.137 
2.137 
2,044 
1,894 
4,293 
2,340 
1,398 
1,243 
2,386 
2,276 
2,200 
2,191 
1,322 
—2,035 
+ 384 
+ 853 
+ 869 
— 249 
— 139 
— 63 
— 147 
+ 572 
—.220 
+.042 
+.085 
+.087 
—.026 
—.014 
—.007 
—.015 
+.055 
Sums. 
+.006 
+.035 
+.033 
—.0U3 
—.010 
+.016 
—.001 
—.013 
+.002 
.119 
+.226 
—.007 
—.052 
— .090 
+.016 
+ .030 
+.006 
+.002 
—.053 
.482 
—.239 
—.263 
—.192 
—.214 
—.236 
—.205 
—.221 
—.220 
—.179 
1.969 
The sums of the residuals, regardless of sign, for these 
fourteen stations are 
With reduction by Bouguer’s method. 2.577 dynes, 
“ “ for elevation. 0.677 “ 
“ “ by Faye’s method. 0175 “ 
