The Dorset County Museum, Dorchester, is a typical example of an older local museum with some items of interest to the touring mathematician. I noted the following items:
a 13C steelyard weight and a standard bushel of 1601,
an 18C pocket scales, along with a number of other weights, measures and scales;
a 1719 turret clock, running, and a 1745 town clock;
some ivory chessmen from an 18C shipwreck;
a horary quadrant (15C??);
two straight slide rules, from 1697 and 1820, both for special purposes;
a simple adding machine (British Calculator, Model B, probably early 20C);
some games material (outdoor darts with spherical bodies about 1" across, quoits, dominoes, china bowls, Halma).

To see an Ordnance Survey map click at THIS LINK

Gazetteer Index Main MacTutor index

An extract from The Mathematical Gazetteer of the British Isles created by David Singmaster

The original site is at THIS LINK