Smith and Dolier's 'arithmetical scales', late 19th century.

Smith and Dolier's arithmetical scales, late 19th century.
Set of 'arithmetical scales' by Smith and Dolier, late 19th century. These 'scales' were used to set many different sums in addition and subtraction. Pupils in a class would probably have used slates to do the sums.
 
Currently on display in:
Mathematics
Year made :
1880-1900
Inventory number :
1995-1615