Clock impulse generator with clock dial showing Greenwich Mean Time in wooden box for Shaw horizontal pendulum seismograph, 1930-1935 Clockwork mechanism for Shaw type seismograph, British, 1930-1935 1930-1935
Part of Shaw horizontal pendulum seismograph. Including small box, cardboard box of small parts, wooden base and clockwork part, 1930-1935 Part of Shaw type seismograph, British, 1930-1935 1930-1935
Base with modern electrical driving motor for Shaw horizontal pendulum seismograph, 1930-1935 Electrical drive motor for Shaw type seismograph, British, 1930-1935 1930-1935
Milne-Shaw seismograph no.1, designed and constructed by John Johnson Shaw, 1914, based on an original design by John Milne. The instrument, which has a horizontal pendulum and electromagnetic damping, was tested at Bidston Observatory, near Liverpool, and in 1918 was transferred to the University Observatory at Oxford. Milne-Shaw seismograph no.1 1914
Milne-Shaw seismograph no. 33, made by John Johnson Shaw, West Bromwich, UK, and owned by the Safety in Mines Research Board, c. 1925 Milne-Shaw seismograph no. 33, c. 1925 circa 1925
Box for Shaw horizontal pendulum seismograph, 1930-1935. Box for Shaw type seismograph, British, 1930-1935 1930-1935
Brass roller for Shaw horizontal pendulum seismograph, 1930-1935 Clockwork mechanism for Shaw type seismograph, British, 1930-1935 1930-1935
Pivot piece bracket and small double bracket for Shaw horizontal pendulum seismograph, 1930-1935 Clockwork mechanism for Shaw type seismograph, British, 1930-1935 1930-1935
Mahogany shelf for Shaw horizontal pendulum seismograph, 1930-1935 Clockwork mechanism for Shaw type seismograph, British, 1930-1935 1930-1935
Recording drum for Shaw horizontal pendulum seismograph, 1930-1935 Part of Shaw type seismograph, British, 1930-1935 1930-1935