American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 179
ude. Another bal-ance of Earnshaw, claimed and patented byhim, was undoubtedly the production of Mr.Firminger, the assistant of Dr. Maskelyn, ofthe Royal Observatory. Mr. Brockbank, the partner of Earnshaw,was the first artisan to unite the two metalsby fusion. Hitherto the laminse had beenfastened… … This improved balance, Fig. 12, has threeradial arms, uniting at the centre, each carry-ing the third part of a compound circularrim. This circle is first turned out of a solidcompound plate of steel and brass, a circularplate of steel of the required diameter beingimmersed in a crucible of melted…
Clocks and watches
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer04inte-428-198.webp)
