Author: Irland, G.A.
Title: A Study of Some Seismometers
Description: Washington, D.C. Govt. Printing Office, 1934. orig.wrappers. 23x14cm, 48 pp. Cover title.. Rubbed. Rubberstamps to cover & last page. Good. ¶ Series: United States Department of the Interior, Bureau of Mines, Technical Paper No. 556.

Keywords: Seismology, Seismometers, Seismometer, Technology, History of Science, Seismograph, Measurement, ,