Artifact Details

Title

Webb adder

Catalog Number

X522.84

Type

Physical object

Date

1869

Manufacturer

C. H. Webb

Place Manufactured

U.S.

Identifying Numbers

Model number Webb Adder
Other number November 5th 12th, 1889 Patent Date November 5th 12th, 1889
Other number on bottom Web Adder #5
Serial number 4055

Dimensions

7 5/8 x 10 x 4 1/2 in.

Copyright Holder

C. H. Webb

Description

Looks like two connected circles

Category

Calculator: mechanical

Credit

Courtesy Gwen and Gordon Bell

Lot Number

X522.84