New York City record and building trades directory (1892)
New York City Record Pub. Co · Park Row, N.Y. : New York City Record Pub. Co. · leaf 700
ion, the vcice in tilts case being diverted into thebranch tube, and thence through the flexible tube to the ear cup, sothat a conversation may be carried on without constantly changingthe end of the tube from the mouth to the ear, and vice versa. Afork supports the ear cup \\ hen the mouth piece… … USE IN A MANUFACTORY.PRICK LISTS ANO ESTIMATES FURNISHED IPON APPLICATION.
Building · Building laws
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