be named from chroma, greek for "color". vauquelin went on to detect traces of chromium in precious gems such as rubies and emeralds, and to hypothesize correctly that chromium gave these gems their brilliant colors. the earliest uses of chromium exploited its compounds. lead chromate , the main compound...
cushion for ball of foot and even surface for attachment of outsole: spreads heated compound on insole, using spatula. ) positions shoe on machine and depresses pedal to lower heated plate that presses and smooths compound. ) may press and smooth compound by hand, using spatula. ) may fill heated reservoir...