PRECISE LEVELING. 25 
Feet. 
Canaseraga, in front of station, west-bound t rack; top of south rail 1,257.0 
Canaseraga, Kingston Hotel, southwest corner, in water table; aluminum tablet stamped 
"1253 ROCHESTER 1902" ^ 2 52. 973 
HORNELLSVILLE QUADRANGLE. 
Burns, in front of station; top of northeast rail 1 , [96. 2 
Burns, 0.4 mile southeast of , north side of track, on east wall of open culvert; chiseled square. 1, L90. L0 
Arkport, in front of station; top of north rail 1 ; 191.9 
Arkport, Methodist Protestant Church, southeast corner, in foundation stone; aluminum 
tablet stamped "1188 ROCHESTER 1902" 1 , i 8 8. 284 
Arkport, 1.91 miles south of, southeast corner of Bridge No. 4, on wing wall; chiseled square. 1, 169.0 
Bornellsville, 0.66 mile north of station, southeast corner of BridgeNo.l, on foundation stone; 
chiseled square 1 7 1 69. 04 
Hornellsville, 0.7 mile east of station, northeast corner of railroad bridge, on foundation wall; 
aluminum tablet stamped "1141 D" 1, 142. 4M 
CATTARAUGUS COUNTY. 
REDHOUSE AND SALAMANCA QUADRANGLES. 
The elevations in the following list are tin- New York portion of the result of two inde- 
pendent double-simultaneous lines of precise leveling run in opposite directions between 
Salamanca, N. Y., and Irvineton, Pa. 
The total divergence between the two lines was 0.043 foot, and the divergence in the 
rerun line of 1902 alone was 0.011 foot. The total correction to the mean line by the 
latest adjustment is 0.128 foot in the total distance of 48.8 miles, increasing the elevation 
at" Irvineton with respect to Salamanca, (he correction to the 1902 line alone being 0.085 
foot. A Buff & Berger precise level was employed in each case, though with an 8-second 
vial in first line and a 4-second vial in later line. The leveling on the forward line was 
done in 1899 by Mr. E. L. MeNair, topographer, and on the backward line in 1902 by Mr. 
D. H. Baldwin, topographer. The standard bench marks are referred to the Dunkirk 
datum and are stamped with the letters "DUNKIRK" in addition to the figures of ele- 
vation and year 1899. 
SALAMANCA, SOUTHWEST ALONG THE PENNSYLVANIA RAILROAD, TO 
STATE LINE. 
SALAMANCA QUADRANGLE. 
Feet. 
Salamanca, Union High School building, Maple street, at rigid of entrance, in water table; 
aluminum tablet stamped " 1391 DUNKIRK 1899" 1,391. 485 
REDHOUSE QUADRANGLE. 
Shongo, in front of station; top of north rail 1,372.0 
Redhouse, in front of station, main track, top of south rail L,345.9 
Redhouse, 0.56 mile southwest of, southeast corner of Bridge No. 126, on foundation coping 
stone; aluminum tablet stamped " 1340 DUNKIRK 1899 1,340.904 
Cold Spring, in front of signboard; top of south rail 1 . 327. 5 
Quaker Bridge, in front of station; top of rail 1, 329. 4 
Quaker Bridge, 1.03 miles southwest of, northeast corner of steel-truss bridge, on foundation 
coping stone; aluminum tablet stamped ' 1310 DUNKIRK 1899" 1,317. 298 
Wolf Run, in front of station; top of south rail 1 , 328. 9 
Wolf Run, 0.10 mile west of, southeast corner of Bridge No. 121, on parapet of coping stone; 
chiseled square 5 > : >'-'^ • ( ' ' v 
Onoville, in front of station; top of west rail 1,306.6 
State line, opposite boundary post; top of east rail 1,295. 2 
