Scientific American. [JULY 30, 1892. 70 Bontems, consisted in the substitution of a genuine lator of the bellows, F, to act through the rod, E. The MECHANICAL SINGING BIRDS. longer it takes the teeth to pass, the longer the valve A reproduction is open and the longer the bellows (No. 2) is… … CONSTRUCTION. EIGHTEENTH CENTURY. chewit, ete. We shall now explain the principle of the There has been an improvement introduced that con- closed in a cage, and the mechanism is contained in mechanism with which it has been possible to repro- sists in placing upon the same rod three pairs of the…
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