Here’s a look at Rothstein Dental Laboratory, Washington D.C. in 1906. Robert J. Rothstein (center) would later organize the NADL and serve as its first president. His nephew, Morris Rothstein, is on the far right holding a ladle. Note that at least three workers (called mechanics back then) are wearing neckties, the overhead light is an electrified gas fixture, and the lack of dust collectors. At the window sill, also notice the three black metal tubes and plungers; these were swaggers used to mash soft plate gold into a cusp formation to be soldered into a band of gold, thus making a gold shell crown. ~LMT, Nov./Dec. 1999; originally submitted by Markus Ring, CDT
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