Chemical Match Output

Number:15a

Maker:Euratom Brink - De Wolde
PHOTO

Length: 26.7 cm

Gauge Marks:

Scales Front: Special Scales = Special Scales = Special Scales

Scales Back:

Info: David Rance Collection
Geochemical Slide Rule
Complex rule invented by Herman de Wolde for calculating the probabilities of the world-wide presence of metal deposits - 1 of only 5 ever made.