✦ LIBER ✦

A new reagent for etching mild steel : W. Rosenhain and J. L. Haughton. (Iron and Steel Inst. Journ., lxxxix, 515)

Publisher: Elsevier Science
Year: 1915
Tongue: English
Weight: 63 KB
Volume: 179
Category: Article
ISSN: 0016-0032
DOI: 10.1016/s0016-0032(15)90657-9

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✦ Synopsis

larly applicable to ocean cables. An alternator is used for transmitting purposes; one pole is earthed, the other being connected through a signalling key, condenser, and sensitive relay to the line circuit. The apparatus is the same at each end of the line, the sensitive relay controlling a sluggish relay, which in turn controls a sounder. Thus firm Morse signals appear on the sounder. It is stated that when alternating current is used for signalling the capacity and resistance of the cable do not interfere with the speed of working, as in the case of direct-current systems.

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New reagent for etching mild steel: W. R

New reagent for etching mild steel: W. Rosenhain and J. L. Haughton. (Iron and Steel Inst., May, 1914.)

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Observations on the Burning of Porcelain. R. ~:~EINDEL. (Spreschsaal, xl, vii, 285.)--The behavior of an experimental oven was studied by the help of Seger cones, a pyrometer, a manometer, and the analyses of the oven gases. The readings of the pyrometer showed higher temperatures than those indicat