Signedplaque inside case: Wm AINSWORTH & SONS, INC.
FunctionThis is a precision balance with several improvements that make it more user-friendly. The principal among them is the multiple rider carrier which is the system on the upper right. It consists of a horizontal graded plate where one can hang little wire weights. This can be done from outside. There are also two magnifying glasses, one coupled to the sliding weight, and another that magnifies the indicator needle. The intention of these improvements is to minimize the need to open the case when measurements are being taken.
For more on the manufacturer of this scale and its improvements, see this website.
ProvenanceFrom the Department of Geology and Geography, Harvard University, courtesy of Prof. Steven Dobos.