000-190-000-949-C
Barometer (detail), made by James Watt
© National Museums Scotland
000-100-044-625-C
Barometer, made by James Watt
© National Museums Scotland
000-100-102-714-C
Plotting protractor
made in Edinburgh
© National Museums Scotland
000-100-102-666-C
Surveyors' compass
Probably made in Glasgow
© National Museums Scotland