Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 367
E INSTRUJ^ENT. ( 1) The instrument is easily constructed. Although the formdescribed is not very portable, it is well adapted to telephonelaboratory use, and is not likely to get out of order. 35^ A. E. Kexxelly and Ch. ]\Iaxxeback. [J. F. I. (2) The instrument enables a frequency measurement to… … 50 60 10 80 90 100 150 ZOQ 250 300 350 W150 500 L = Millimeters (5) Large available frequency range. The instrument heredescribed covers a tenfold range. ,«ak.«M DISADVANTAGES. (i) Owing to the numerous possible nodes of vibration ofa monochord, care must be exercised to measure the…
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