78 
PRIMARY TRIANGULATION AND PRIMARY TRAVERSE. 
Subsurface mark: A 1-inch hole drilled 3 inches deep directly undei 
station mark, with two nails placed in it. 
Reference marks: (1) A drill hole 1 inch in diameter and 1 inch dee] 
in surface bowlder, true azimuth, 37° L2": distant 87.3 feet; (2) i 
drill hole 1 inch in diameter and 1 inch deep in surface bowlder, tru< 
azimuth, 102° 54'; distant 63 feet. 
[Latitude 42° 50 / 39. 60". Longitude 75° 06 / 00. 84".] 
To station— 
Azimuth. 
Hack azimul h. 
Log. distance 
Plainfield 
o / // 
62 48 24. 17 
85 30 53.86 
95 44 20.00 
121 26 42.52 
184 55 41.00 
' 166 40 L0.98 
o / // 
242 44 50.86 
265 18 47.85 
Meters. 
3. 903924 
4. 386429 
3.69171 
1. 816870 
3. 58656 
Brookiield 
A rmsl r< >ng 
Tassel 
McCarty 
301 17 51. ss 
Litchfield 
346 38 19. 77 
4. 205457 
PLAIN FIELD, OTSEGO COUNTY. 
On a bald ridge owned by J. J. Roberts in town of Plainfield, L.il 
miles south of Plainfield ('enter. 
Station mark: A Milestone post 36 by 6 by n' inches set 22 inches ii 
the ground and resting on solid rock. In the center of top of post ii 
cemented a bronze triangulation tablet. 
[Latitude 42° 48 / 4().77 // . Longitude 75° 1 V 14.64".] 
To station- 
Brookfield 
Tassel 
Litchfield 
Azimuth. 
Back azimuth. 
05 47 59. S7 
143 51 28. 75 
190 01 32. 16 
275 80 26.87 
828 46 06.78 
10 03 14.58 
Armstrong 208 14 23. 00 
McCarty 214 28 34.00 
Owen 242 44 50. 86 
Log. distancj 
62 48 24.17 
Mi U r*. 
4. 236338 
4. 2530 J 
4. 291867: 
8. 67382 
3. 88961 ; 
3.908'.>2*1 
PRIMARY TRAVERSE. 
ERIE COUNTY. 
EDO QUADRANGLE. 
The following geographic positions were determined from primar 
traverse by Mr. E. L. McNair, topographer, in L904. The line start 
at Hamburg triangulation station, United States Lake Survey, follow 
highways eastward to Orchard Park, and is connected with a point a: 
