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

4550 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
4551 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
4552 thumbnail picture
Theodolite magnetometer. Fig. No. 29, Report of Superintendent ... 1865
1865
4553 thumbnail picture
Portable transit. Fig. No. 29, Report of Superintendent ... 1866
1866
4554 thumbnail picture
Zenith telescope. Fig. No. 28, Report of Superintendent ... 1866
1866
4555 thumbnail picture
Twelve inch repeating circle (bottom) and heliotrope (top). Fig. No. 27, Report of Superintendent ... 1866
1866
4556 thumbnail picture
Thirty inch theodolite. Fig. No. 26, Report of Superintendent ... 1866
1866
4557 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
4558 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
4559 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
4560 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
4561 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
4562 thumbnail picture
30 centimeter theodolite. Plate I, Fig. No. 7, Appendix No. 8, Report of Superintendent ... 1894, p. 276
1894
4563 thumbnail picture
Meridian and equal altitude instrument for astronomic observations. Fig. No. 28, Report of Superintendent ... 1867
1867
4564 thumbnail picture
Sorenson's engraving pantograph. Fig. No. 27, Report of Superintendent ... 1867
1867
4565 thumbnail picture
20 centimeter theodolite. Plate II, Fig. No. 8, Appendix No. 8, Report of Superintendent ... 1894, p. 276
1894
4566 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
4567 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
4568 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
4569 thumbnail picture
Avery's one-roller tide gauge. Figure 2, Appendix No. 9. Part II, Report of the Superintendent ... 1897, p. 481
1897
4570 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
4571 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
4572 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
4573 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
4574 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
4575 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
4576 thumbnail picture
Magnetic observations by party of M. L. Cleven.
Alaska, Nome Early summer 1947
4577 thumbnail picture
Magnetic observations by party of M. L. Cleven in east-central Alaskan Arctic.
Alaska, Saganavirktok River Early summer 1947
4578 thumbnail picture
Observing magnetics with transit magnetometer at Station Mir 2. Party off of EXPLORER
Alaska, Amchitka Island, Aleutian Islands June 12, 1949
4579 thumbnail picture
Observing absolute value of horizontal component of the Earth's magnetic field.
Maryland, Cheltenham Observatory 1931
4580 thumbnail picture
Measuring absolute value of declination with a declinometer.
Maryland, Cheltenham Observatory 1931
4581 thumbnail picture
Co-tidal lines of the world.
1916
4582 thumbnail picture
Making magnetic observations for declination.
Washington, D.C. area 1931
4583 thumbnail picture
Chart showing isogonic lines for year 1900. Isogonic lines are lines of equal declination
4584 thumbnail picture
Magnetic station near El Misti Volcano, Peru. Party of James Baden
Peru, Arequipo 1947
4585 thumbnail picture
Transit magnetometer station.
Alaska, Southeast Alaska Ca. 1980
4586 thumbnail picture
Transit magnetometer station. Party off of PATHFINDER
Hawaii, Hawaii 1970
4587 thumbnail picture
Using compass declinometer for magnetic observations. Lt. Benjamin H. Rigg observing. Accompanied MacMillan Arctic Expedition.
Greenland 1926
4588 thumbnail picture
Lt. B. H. Rigg making magnetic observations in Canadian Arctic. Accompanied MacMillan Arctic Expedition
Canada, Eastern Canadian Arctic 1926
4589 thumbnail picture
Lt. B. H. Rigg preparing to make magnetic observations in Canadian Arctic. Accompanied MacMillan Arctic Expedition
Canada, Eastern Canadian Arctic 1926
4590 thumbnail picture
A Z-Variometer. Instrument measures relative changes in vertical component of Earth's magnetism
1954
4591 thumbnail picture
Magnetic station at Hobhouse Inlet. Party of Joel Campbell
Canada, Devon Island, Canadian Arctic 1946
4592 thumbnail picture
Lt. Charles A. Schoene observing magnetics at Little America IV. Schoene accompanied Operation High Jump
Antarctica February 1947
4593 thumbnail picture
Magnetic observatory at Little America IV. Tent used for absolute observations while center building used for variation
Antarctica February 1947
4594 thumbnail picture
Chart showing isogonic lines for year 1900. Isogonic lines are lines of equal declination
4595 thumbnail picture
Brown Gravity Meter - a pendulum apparatus.
Ca. 1935
4596 thumbnail picture
Brown Gravity Meter pendulum apparatus.
Ca. 1935
4597 thumbnail picture
Observing gravity inside the cave at Station Jaggar. Party of E. J. Brown
Hawaii, Summit of Mauna Loa 1927
4598 thumbnail picture
Gravity and radio apparatus on Necker Island. Observations as part of World Longitude Network. Party of E. J. Brown
Hawaii, Necker Island 1928
4599 thumbnail picture
Lt. Joseph Lushene observing gravity in Bahamas. Cooperative project with the Navy and F. A. Vening Meinesz
Bahamas Islands, White Point 1932

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Last Updated:
July 7, 2015