necessity of changing the tube from mouth being found in the island), but where the slightest to ear, and vice versa, during conversation. .A few seen in practical use. inches beyond the mouthpiece into which the speaker dampness manifests itself, cast iron segments grouted te Forells Portland… … may, respectively, be in the proportion of seventeen to The tool shown in side view and enlarged section in CUTMORE’S “HOMACOUSTIC” SPEAKING TUBE. ten. The amount of the hydraulic factorsin the Roman the illustration combines a calipers for truing balance cement is first ascertained and the hydrate…
Internet Archive · Public domain (published before 1931). Free to use for anything.
![An illustration from [Catalogue] (1908)](https://img.insideoutlibrary.com/img/200/ia-catalogue00demo-81-166.webp)
![An illustration from The Telegrapher [microform] (1864)](https://img.insideoutlibrary.com/img/200/ia-telegrapher05nati-320-204.webp)
