s, vised a peculiar form of annular burner, similar to those some- i if well charged, are considerable, even when the bodies pre- times used in producing the oxyhydrogen light, but provided sented to them contain but slight charges of electricity. with an adjustable tip on the end of the outer… … Fig. 5, a hoarse voice will produce a small extra flame be- CIRCULAR MIRROR. THE SPEAKING FLAME. supposed M. Rameaux has found this arrangement in all cases more sensitive and sure than a carefully constructed gold leaf electroscope which he used for comparison. This tube with a gas burner in the…
Internet Archive · Public domain (published before 1931). Free to use for anything.
