Balance Small 320×260 Medium 640×520 Large 1024×832 Download Tiff Original 2400×1951 | (2.0 MB) Description "The balance is essentially a lever of the first class, having equal arms. The beam carries a pan at each end, one for the weidhts used, the other for the article to be weighed." -Avery 1895 Keywords Arms, balance, class, equal, first, lengths, lever Galleries Chemistry Apparatus Source: Elroy M. Avery School Physics (New York: Sheldon and Company, 1895) 133 Courtesy the private collection of Roy Winkelman
