| Unidentified photographer/creator Kent's Chemical Laboratory 1855 Book illustration Google Books LL/34647 Published in "Descriptive Catalogue of Chemical Apparatus, Chemicals and Pure Reagents, Manufactured, Imported and Sold by Edward N. Kent, Practical Chemist No.116 Jiohn-Street, Near Pearl, New-York" (New-York: Van Norden & Amerman, 1855), Sixth edition
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