"c VAR 0039 03003I SEVEN 1R 865-891 MD= 1E-37 " "c REF 0039 LOC 312 WIDTH 9 DK 5 COL 62-70 " "c EXP DEC= 2 " "c " "c TONS OF FREIGHT CARRIES ONE MILE, SEVEN RAILROADS " "c ------------------------------------------------- " "c " "c NBER SERIES: 03003I " "c AREA COVERED: U.S. " "c UNITS: BILLIONS OF TON-MILES " "c ANNUAL COVERAGE: 1865-1891 " "c QUARTERLY COVERAGE: NONE " "c MONTHLY COVERAGE: " "c SEASONAL ADJUSTMENT: NONE " "c SOURCE: POOR'S MANUAL OF RALROADS, 1888, P. XXVII-XXIX; " "c 1889, P. VIII; AND VOLUMES FOR 1890, 1891, AND 1892 " "c " "c NOTES: THE SEVEN RAILROADS ARE: (1)--PENNSYLVANIA RAILROAD " "c (2)--PITTSBURGH, FORT WAYNE, AND CHICAGO R.R. (3)--NEW YORK " "c CENTRAL R.R. (4)--LAKE SHORE R.R. (5)--MICHIGAN CENTRAL R.R. " "c (6)--BOSTON AND ALBANY R.R. (7)--NEW YORK,LAKE ERIE AND " "c WESTERN R.R. " "c DATA FOR 1887-91 WERE COMPUTED BY ADDING TON-MILES OF " "c THE SEVEN INDIVIDUAL RAILROADS. " "c " "c CHECKED MANUALLY; NO CORRECTIONS NECESSARY. " "c " "c "