Signedon the face of the gauge: FEDERAL / FEDERAL PRODUCTS CORPORATION/ PROVIDENCE , R.I. U.S.A/ .OOO1/ C21
FunctionDial indicators are used to measure minute lengths, especially changes in length. This one for example measures in the order or 0.0001 inches. They are most frequently used to analyze the deformation of substances or structures under pressure.
Historical AttributesOwned and used by Prof. Benjamin M. Shaub(1893-1993), Department fo Geology, Smith College, Northampton, MA 01063
ProvenanceProf. Benjamin M. Shaub, Department of Geology, Smith College, Northampton, MA 01063. Prof. Shaub gifted a total of 11 instruments to the Collection, inventory #s 1997-1-1997 thru 1997-1-2007.