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NOAA's Historic Coast & Geodetic Survey (C&GS) Collection
Catalog of Images

4900 thumbnail picture
After making contact, the forward end of tape is moved ahead. Note lantern and flashlight - these operations were conducted at night. Relatively constant night temperatures minimized expansion of tape. Fig. No. 12, Appendix No. 3, Report of Superintendent ... 1901, p. 258
1901
4901 thumbnail picture
Making contact at rear end of tape. Man standing is maintaining pre-set constant tension on line. Man kneeling is reading tape. Fig. No. 11, Appendix No. 3, Report of Superintendent ... 1901, p. 258
1901
4902 thumbnail picture
Aligning iced-bar base apparatus with striding level. Assuring iced-bar apparatus is horizontal. Fig. No. 5, Appendix No. 3, Report of Superintendent ... 1901, p. 244.
1901
4903 thumbnail picture
Stone marking end of comparator, a 100-meter very stable short base line. Comparator was used to calibrate and intercompare various measuring instruments . This comparator was at Shelton, Nebraska, near Station Shelton East Base. Fig. No. 2, Appendix No. 3, Report of Superintendent ... 1901, p. 244
Nebraska, Shelton 1901
4904 thumbnail picture
Plane table alidade. Plate IV, Fig. No. 10, Appendix No. 8, Report of Superintendent ... 1894, p. 276
1894
4905 thumbnail picture
Magnetometer and altazimuth instrument. Plate III, Fig. No. 9, Appendix No. 8, Report of Superintendent ... 1894, p. 276
1894
4906 thumbnail picture
Aligning support nails for steel tapes. Fig. No. 10, Appendix No. 3, Report of Superintendent ... 1901, p. 258
1901
4907 thumbnail picture
Duplex measures, carrying the rear bar ahead. After making contact, the rear bar was moved to the forward position. It was then realigned horizontally, vertically, and for azimuth on the base line . Fig. No. 9, Appendix No. 3, Report of Superintendent ... 1901, p. 244
1901
4908 thumbnail picture
Duplex measures, ready to launch the rear bar. After making contact, the rear bar was moved to the forward position. It was then realigned horizontally, vertically, and for azimuth on the base line . Fig. No. 8, Appendix No. 3, Report of Superintendent ... 1901, p. 244
1901
4909 thumbnail picture
Duplex measures, making the final contact. "Contact" meant bringing the two aligned bars together so the ends were touching . Fig. No. 7, Appendix No. 3, Report of Superintendent ... 1901, p. 244.
1901
4910 thumbnail picture
Using Eimbeck duplex base-line measurement apparatus. Aligning duplex bar horizontally and vertically. Fig. No. 6, Appendix No. 3, Report of Superintendent ... 1901, p. 244.
1901
4911 thumbnail picture
Theodolite magnetometer. Fig. No. 29, Report of Superintendent ... 1865
1865
4912 thumbnail picture
Portable transit. Fig. No. 29, Report of Superintendent ... 1866
1866
4913 thumbnail picture
Zenith telescope. Fig. No. 28, Report of Superintendent ... 1866
1866
4914 thumbnail picture
Twelve inch repeating circle (bottom) and heliotrope (top). Fig. No. 27, Report of Superintendent ... 1866
1866
4915 thumbnail picture
Thirty inch theodolite. Fig. No. 26, Report of Superintendent ... 1866
1866
4916 thumbnail picture
Transferring the measurement to the ground work. Completing the Salt Lake City Base. Distance measurement with Eimbeck base bar apparatus. Figure No. 9, Appendix No. 12. Part II, Report of the Superintendent ... 1897, p. 774
Utah, Salt Lake City 1897
4917 thumbnail picture
Crossing a railway embankment on the Salt Lake City Base. Using the Eimbeck base bar apparatus. Figure No. 8, Appendix No. 12. Part II, Report of the Superintendent ... 1897, p. 774
Utah, Salt Lake City 1897
4918 thumbnail picture
Beginning the measurement of the Salt Lake City Base. Perhaps last use of Eimbeck base bar apparatus. Figure No. 7, Appendix No. 12. Part II, Report of the Superintendent ... 1897, p. 774
Utah, Salt Lake City 1897
4919 thumbnail picture
Duplex bar No. 15 on its trestles. Figure No. 5, Appendix No. 11. Part II, Report of the Superintendent ... 1897, p. 483.
1897
4920 thumbnail picture
Duplex bars of Eimbeck base measuring instrument in contact. Figure No. 4, Appendix No. 11. Part II, Report of the Superintendent ... 1897, p. 483.
1897
4921 thumbnail picture
30 centimeter theodolite. Plate I, Fig. No. 7, Appendix No. 8, Report of Superintendent ... 1894, p. 276
1894
4922 thumbnail picture
Meridian and equal altitude instrument for astronomic observations. Fig. No. 28, Report of Superintendent ... 1867
1867
4923 thumbnail picture
Sorenson's engraving pantograph. Fig. No. 27, Report of Superintendent ... 1867
1867
4924 thumbnail picture
20 centimeter theodolite. Plate II, Fig. No. 8, Appendix No. 8, Report of Superintendent ... 1894, p. 276
1894
4925 thumbnail picture
Tidal indicator erected at Reedy Island on the Delaware River, Delaware. Figure No. 5, Appendix No. 9. Part II, Report of the Superintendent ... 1897, p. 483. This and two other indicators at New York and San Francisco built by C&GS. Face is thirty feet in diameter
Delaware, Reedy Island, Delaware River 1897
4926 thumbnail picture
Stierle gauge as modified by the Coast and Geodetic Survey. Figure No. 4, Appendix No. 9. Part II, Report of the Superintendent ... 1897, p. 482
1897
4927 thumbnail picture
Stierle gauge as modified by the Coast and Geodetic Survey. Figure No. 3, Appendix No. 9. Part II, Report of the Superintendent ... 1897, p. 482
1897
4928 thumbnail picture
Avery's one-roller tide gauge. Figure 2, Appendix No. 9. Part II, Report of the Superintendent ... 1897, p. 481
1897
4929 thumbnail picture
Saxton self-registering tide gauge - model of 1853. Figure 1, Appendix No. 9. Part II, Report of the Superintendent ... 1897, p. 481
1897
4930 thumbnail picture
Clock-face view of modified Stierle tide gauge, model of 1896. Plate No. 5 of Appendix No. 7. Part II, Report of the Superintendent ... 1897, p. 318
1897
4931 thumbnail picture
Modified stierle tide gauge, model of 1896. Plate No. 4 of Appendix No. 7. Part II, Report of the Superintendent ... 1897, p. 318
1897
4932 thumbnail picture
Saxton self-registering tide gauge, model as of 1897. Plate No. 3 of Appendix No. 7. Part II, Report of the Superintendent ... 1897, p. 318
1897
4933 thumbnail picture
Magnetic declination and dip station. Observations at Boundary Marker No. 1. This was at the northernmost point on the Alaska-Canada Boundary. Party of J. T. Watkins - transportation by Coast Guard Cutter Bear
Alaska, Demarcation Point August 15, 1921
4934 thumbnail picture
Magnetic observations by party of J. T. Watkins. Station was about 10 miles west of East Cape, Siberia. Transportation by Coast Guard Cutter Bear
USSR, Near Whalen, Siberia August, 1921
4935 thumbnail picture
Magnetic observations by party of M. L. Cleven.
Alaska, Nome Early summer 1947
4936 thumbnail picture
Magnetic observations by party of M. L. Cleven in east-central Alaskan Arctic.
Alaska, Saganavirktok River Early summer 1947
4937 thumbnail picture
Observing magnetics with transit magnetometer at Station Mir 2. Party off of EXPLORER
Alaska, Amchitka Island, Aleutian Islands June 12, 1949
4938 thumbnail picture
Observing absolute value of horizontal component of the Earth's magnetic field.
Maryland, Cheltenham Observatory 1931
4939 thumbnail picture
Measuring absolute value of declination with a declinometer.
Maryland, Cheltenham Observatory 1931
4940 thumbnail picture
Co-tidal lines of the world.
1916
4941 thumbnail picture
Making magnetic observations for declination.
Washington, D.C. area 1931
4942 thumbnail picture
Chart showing isogonic lines for year 1900. Isogonic lines are lines of equal declination
4943 thumbnail picture
Magnetic station near El Misti Volcano, Peru. Party of James Baden
Peru, Arequipo 1947
4944 thumbnail picture
Transit magnetometer station.
Alaska, Southeast Alaska Ca. 1980
4945 thumbnail picture
Transit magnetometer station. Party off of PATHFINDER
Hawaii, Hawaii 1970
4946 thumbnail picture
Using compass declinometer for magnetic observations. Lt. Benjamin H. Rigg observing. Accompanied MacMillan Arctic Expedition.
Greenland 1926
4947 thumbnail picture
Lt. B. H. Rigg making magnetic observations in Canadian Arctic. Accompanied MacMillan Arctic Expedition
Canada, Eastern Canadian Arctic 1926
4948 thumbnail picture
Lt. B. H. Rigg preparing to make magnetic observations in Canadian Arctic. Accompanied MacMillan Arctic Expedition
Canada, Eastern Canadian Arctic 1926
4949 thumbnail picture
A Z-Variometer. Instrument measures relative changes in vertical component of Earth's magnetism
1954

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Last Updated:
November 10, 2017