Signedprinted at the end of the scale along the bottom of the outermost cylinder: ENTD. STATS. HALL. / STANLEY, Maker, LONDON
Inscribedserial number stamped on index: 899
printed at the beginning of the scale on the outermost cylinder: FULLERS SPIRAL SLIDE RULE
stenciled in Gothic letters in black paint on the lid of the case: Calculator
FunctionTo perform multiplication and division problems to five significant figures.
Primary SourcesGeorge Fuller, A Calculating Slide Rule Equivalent to a Straight Slide Rule 83 Feet 4 Inches Long, or, a Circular Rule 13 Feet 3 Inches in Diameter (London: W. F. Stanley, 1897). [copy in the file of inv. 1989-1-0038]
ProvenancePossibly came to CHSI from the Mallinckrodt Chemistry Lab of the Harvard Department of Chemistry, circa 1963.