A text-book of physics, largely experimental. On the Harvard college "Descriptive list of elementary physical experiments." (1891)
Hall, Edwin Herbert, 1855-1938, Bergen, Joseph Y. (Joseph Young), 1851-1917 · New York, H. Holt and Company · leaf 440
FIG. 229. PHYSICS. Count the number of vibrations of the pendulum per minute, andfind from the smoked plate the number of vibrations of the tuning-fork corresponding to one vibration of the pendulum. Then calcu-late the number of complete double vibrations of the tuning-fork persecond. The pitch of…
Physics
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