Farmar / Standard Slide Rule for the Wine & Spirit Trade
Farrow & Jackson Ltd.
UK
Wood/celluloid
1902-1930
38.1 cm
Wine & Spirit
Notes: An attempt to make a slide rule that met the needs of everyone in the spirit trade - from brewers and distillers to pub owners. Was used in conjunction with a hydrometer and came in three sizes - this model was the mid-sized version.
