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Title: Simple apothecary balance comprising 2 clock glasses connect [Go to resource]
Description: Simple apothecary balance comprising 2 clock glasses connected to beam by 3 silk cords, c. 1894. License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: balance Source: Science Museum Identifier: 1991-409 Go to resource More Like this...
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