000-100-104-221-C
Specific gravity beads
probably made in Glasgow
© National Museums Scotland
000-100-104-227-C
Specific gravity beads
probably made in Edinburgh
© National Museums Scotland
000-100-104-256-C
Specific gravity beads
probably made in Glasgow
© National Museums Scotland
000-100-104-267-C
Instruction book, for set of specific gravity beads
© National Museums Scotland
000-190-002-208-C
Instruction book, for set of specific gravity beads
probably made in Edinburgh
© National Museums Scotland
000-190-002-207-C
Slide rule & thermometer, from set of specific gravity beads
probably made in Edinburgh
© National Museums Scotland