nt in It is so situated that only a tremor of the earth itself can affect it, but although its utility for recording the Superstition of a Well-Known Writer. the United States by which the time and duration of earthquakes can be recorded. time and duration of seismic shocks has been fully There are… … 900 revolutions per minute and gear directly with a sin- time, held the belief that the number 17 had a malign THE MARVIN SEISMOGRAPH. gle reduction to the internal gears on the 36 inch driving influence upon him, and that aggravated the case. wheels. As the motors are independent, the differen-…
Patents · Munn · Bicycle · Apparatus · Caisson · Scientific American · Cents · Large number · Gas engine · American association · Crookes tube · Sewing machine · Presser foot · Working chamber · Perspective elevations · Custom house
Internet Archive · Public domain (published before 1931). Free to use for anything.
