56 
PRIMARY TRIANGULATION AND PRIMARY TRAVERSE. 
FREDERICK COUNTY, MONOCACY QUADRANGLE — Continued. 
Geographic positions along highways — Continued. 
Station. 
Four corners, 350 feet north of, cemented in southwest 
corner of brick dwelling of Mr. Robert Graham, alumi- 
num tablet stamped "Prim. Trav. Sta. No. 490 " 
Forks of road, small grassplot in angle of, 25 feet east to 
mark on fence, 20 feet west to locust tree 
Old Mill, 3 corners 300 feet north of, 25 feet south to 
bridge, 50 feet northeast to apple tree 
Frederick, 1 mile west of, at pike junction, 45 feet south- 
west to corner wire fence, 25 feet southeast to mark on 
plank fence 
Frederick, junction of National and Jefferson pikes at 
west edge of, 25 feet northwest to telephone pole, 25 
feet south to telephone pole 
Latitude. 
o / // 
39 19 54. 3 
39 21 38. 2 
39 22 27. 3 
39 24 17.0 
39 24 40. 6 
MONTGOMERY COUNTY, ROCKVILLE QUADRANGLE. 
Geographic positions along highways. 
Station. 
Latitude. 
Longitude. 
Cedar Grove, grass plot at forks of road 100 feet west of 
Upper Seneca Baptist Church 
o 
39 
39 
39 
39 
39 
39 
39 
39 
39 
39 
14 26. 7 
12 35. 9 
12 35. 2 
12 49. 7 
12 25. 2 
12 03. 6 
12 13. 1 
12 29. 6 
12 42. 6 
13 08. 5 
13 18.5 
13 36.7 
14 58. 6 
o / // 
77 14 05. 1 
Brink post-office, 4 corners, 27 feet west to nail in per- 
simmon tree, 27 feet north to nail in fence post 
Brink post-office, cemented in rock foundation at north- 
east corner of dwelling of W. T. Dowden, aluminum 
tablet stamped "Prim. Tra. Sta. No. 341 " 
77 14 24. 4 
77 14 25. 1 
Neelsville, large spreading tree at forks of road 
77 14 57. 2 
Forks of road, 30 feet northwest to chestnut tree, 35 feet 
southwest to oak tree 
77 13 08.0 
Seneca Creek, forks of road 80 feet southeast of center of 
bridge over, 45 feet southeast to mark on fence corner . 
Goshen, forks of road, 20 feet west to fence, 30 feet south- 
east to stump 
77 12 14.2 
77 11 14.9 
Lay tons ville, 4 corners, 1$ miles west of, 40 feet south- 
west to locust tree, 40 feet northeast to mark on fence 
corner 
77 10 10.3 
Laytonsville, cemented in north wall of brick dwelling of 
Mr. Ed. O. Brown on southeast corner of Baltimore 
and Washington streets, aluminum tablet stamped 
"Prim. Trav. Sta. No. 46" 
77 08 34.8 
Hawlings River, center of bridge over 
77 06 21.1 
Forks of road, at whitewashed house, 25 feet north to 
yard fence, 35 feet south to fence 
39 
39 
39 
77 05 09.2 
Unity, 4 corners, \ mile west of, 30 feet northwest to 
stump, 25 feet southeast to corner of plank fence 
Patuxent River, center of bridge over 
77 04 34.9 
77 03 58.9 
