Wilson etal.] PENNSYLVANIA. 59 
PENNSYLVANIA. 
ERRATA IN PREVIOUS REPORTS. 
A field error occurred in the levels published in the Appendix to 
the Twenty-first Annual Report, page 442, between West Browns- 
ville Junction and Jacob Ferry. The elevations of these terminal 
points are corrected in this report. 
In addition to above the following corrections are to be applied, 
which arc derived from the latest adjustment of the United Stales 
Coast and Geodetic Survey: 
In the Appendix to the Twenty-first Annual Report, pages 421 and 
437: 
Corrections. 
Foot. 
Elevation of tablet " 635 Pittsburg 1899 "' at Erie hO. 322 
(Note. The elevation published in the Coast Survey Report is 0.4.30 
foot too high, due to a clerical error not affecting adjacent elevations in 
the same list. ) 
Page 425 : Elevation at West Penn Junction 4-0. 243 
Pages 426 and 440: Elevation at Pittsburg .. 0.191 
Pages 440-442: List of elevations between Union town, page 440, and 
Lemont, page 442 .. . +0.181 
Page 442: Elevation at West Brownsville Junction +0.192 
Pages 442-443: List of elevations from Point Marion to Greensboro _ +0. 166 
( Note. The above corrections are thoe applied to the precise line run 
from Erie, via Pittsburg, to Grafton, W. Va.. a the selected points 
mentioned. The corrected elevations of tablets at these and intermedi- 
ate points are published in the Coast Survey Report above mentioned.; 
Page 431. Elevation at Harnsburg +0.148 
ARMSTRONG AND INDIANA COUNTIES. 
Rural Valley Quadrangle. 
The elevations published in the following- lisi are based on and 
adjusted between two bench marks established in the course of pre- 
cise leveling by the United States Geological Survey. One is a 
bronze tablet set in front face of northwest corner of public school, 
corner of McKain and Vine streets, Kittanning, marked "803 PITTS- 
BURG 1899," and the Other is a bronze tablet set in the north abut- 
ment, west side of iron bridge, 2 miles south of Rimerton, marked 
"820 PITTSBURG 1899." The elevations of these, as derived by the 
latest adjustment of the United States ('oast and Geodetic Survey, in 
1900, are accepted as 803.870 feet above mean sea level for Kittanning 
and 821.148 feet for Rimerton. 
The leveling was executed under the direction of Mr. Frank Sutton, 
topographer,, and by Mr. J. H. Wetzel, levelman, in 1900. 
All bench marks are referred to an aluminum tablet set in founda- 
tion of Seventh Avenue Hotel" at Pittsburg, marked "738 PITTS- 
BURG 1899," the elevation of which is accepted as 738.718 feet above 
