Object Details
- Exactus
- Description
- This black and silver-colored metal instrument is a notched band adder with nine bands, eight columns, and a nine-digit display. Its bracket-shaped columns are color-coded for dollars and cents. A plate attached to the top which covers the lower part, for use in addition, or pivots and covers the upper part, for use in subtraction. Across the top is a zeroing bar. The device includes a metal stylus and fits in a black plastic case which also holds several yellowing sheets of paper. Instructions are stored with the object.
- This British adder was received at the Smithsonian in about 1970. It seems likely that it was made in the mid-20th century.
- Location
- Currently not on view
- Credit Line
- Gift of Howard Chapelle
- ca 1950
- ID Number
- 1987.0788.04
- accession number
- 1987.0788
- catalog number
- 1987.0788.04
- Object Name
- adder
- Physical Description
- metal (overall material)
- plastic (overall material)
- Measurements
- overall: 1 cm x 7.9 cm x 11.5 cm; 13/32 in x 3 1/8 in x 4 17/32 in
- place made
- United Kingdom: Grand Bretagne
- United Kingdom
- See more items in
- Medicine and Science: Mathematics
- Adder
- Science & Mathematics
- National Museum of American History
- Subject
- Mathematics
- Record ID
- nmah_690269
- GUID (Link to Original Record)
- https://n2t.net/ark:/65665/ng49ca746a5-13b9-704b-e053-15f76fa0b4fa
