36 PRIMARY TRI ANGULATION AND PRIMARY TRAVERSE, [bull. 201. 
MARYLAND. 
PRIMARY TRAVERSE. 
The Ellicott and Westminster quadrangles were controlled Try 80 
miles of primary traverse which, beginning near the southwest corner 
of Baltimore City, follows the electric railway to Ellicott City, thence 
along highways to Glenelg post-office, thence northward approxi- 
mately on the seventy-seventh meridian to the Maryland-Pennsyl- 
vania boundary Line, thence eastward along this line to the Western 
Maryland Railroad crossing, where it was connected with line run 
by Mr. Hall in 1899. A line was also run along the Western Mary- 
land Railroad from Westminster to Glyndon. This work was 
executed by Mr. E. L. McNair, topographer, in April, 1902. 
Geographic positions along the electric road, Baltimore to Ellicott City, thence 
u-est /ran! along highways to Glenelg post-office, thence northward to 
Westminster. 
Station. 
Latitude. 
Longitude. 
Baltimore, intersection of Yale avenue and Fred- 
erick pike 
Catonsville, opposite First National Bank . _ _ 
39 16 54.5:} 
39 16 19.8 
39 16 25.9 
39 16 25.6 
39 16 03.2 
39 15 21. 1 
39 14 23.5 
39 14 08.4 
39 14 01.5 
39 14 39.7 
39 14 59.2 
39 15 52. 7 
39 15 37.2 
39 17 14.0 
39 19 14.5 
39 21 10.6 
39 23 09.5 
39 24 26.4 
39 25 46.2 
39 27 25.7 
39 28 49.8 
39 29 37.7 
39 32 13.9 
76 41 09.45 
76 43 53.9 
Rolling road and electric railway crossing 
Road and electric railway crossing . 
76 45 24. 1 
76 46 42.9 
Ellicott City, opposite Howard House, at junction 
Clarksville and Frederick pikes 
76 47 53.4 
Road east, telephone line 
76 49 12.7 
Columbia post-office, road, four corners 
76 50 15.9 
Road north 
76 52 07.2 
Forks of road, west and northwest.. 
76 53 48.5 
Patuxent River, middle branch . 
76 54 36.4 
Road crossing, telephone line ... 
76 55 56.4 
Triad elphia pike on north 
76 58 52.9 
Glenelg, Providence M. E. Church, bronze tablet 
in southeast corner . 
77 00 37. 1 
Glenwood post-office and store . 
77 01 43.0 
Frederick pike, crossing 
Baltimore and Ohio Railroad crossing 
77 01 11.5 
77 00 57.4 
Road west . . . 
77 01 10.2 
Berrett post-office, four corners 
77 00 59.8 
Liberty pike crossing . 
Road east . 
77 00 30.8 
77 00 14.9 
Morgan Run crossing 
77 00 14.5 
Road intersection 
76 59 55.2 
Fenby post-office and tollgate_ 
76 59 41.0 
