Machinery and processes of the industrial arts, and apparatus of the exact sciences (1869)
Barnard, Frederick A. P. (Frederick Augustus Porter), 1809-1889 · Washington, Govt. print. off. · leaf 530
s in unison. the tubes sounds a harmonic of the other, the images arrange themselvesin a manner analogous; but the relations of the flame-images becomeless apparent as the ratios of the concords are less simple. By employ-ing only one flame, however, and bringing it into connection with…
Machinery · Scientific apparatus and instruments
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