Pascal Adder (Pascaline) - replica

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Date Introduced
1645 (original); 1981 ca. (replica)
Photographer
Richards, Mark
Dimensions
3 3/4 x 14 1/4 x 5 1/4 in.
Manufacturer
Roberto Guatelli
Credit Line
Loan of Gwen and Gordon Bell
Copyright Owner
© Mark Richards
Location
United States
Keywords
1642; Mechanical calculation
Object ID
B150.81

The Pascaline was operated by inserting a stylus at, say, the number “3” position in a toothed wheel, then rotating the wheel until it hit a stop. The complicated and unreliable internal carry mechanism used falling weights instead of linked gears.