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Farmar, F.C.: Publicans' Rule

Farmar Publicans’

Details of: Farmar, F.C. - Publicans' Rule

Type? Usually a generic name preceded by the form if not standard linear length - e.g. Pocket Enhanced Mannheim. For special models often supplemented by its function/use - e.g. meteorology. Sometimes a suffix is needed to distinguish between different versions - e.g. early or late. Standard for Licensed Victuallers
Sort? L/C/D/T/W/X where L=Linear, C=circular, D=Drum, T=tubular, W=watch, X=miscellaneous (i.e. the rest) L
Construction? Basic construction form of the body i.e. Closed/solid frame or Open frame or Duplex or Other Duplex
Material? Basic description: ivory/bone/wood/bakelite/plastic/metal/cardboard or combinations e.g. wood/veneered, wood/painted, etc wood/brass bindings
Length? Mostly length in cm or ” (inches) of the D scale but excluding any scale extensions. But for circular or watch slide rules it is the diameter & for tubular or drum slide rules it is the overall linear scale length. For other mechanical aids it is the physical length. 12"
Scales front? Mostly standardised (not maker’s) symbols for scales on front of stock e.g. A = X² (1-100) but § = generic symbol for any non-standard scale. Scales between solidi (/ /) are on the slide(s) whereas a vertical line ( | ) or reversed solidus ( \ ) + a symbol denotes scale(s) on a straight or bevelled edge. § | §,§, A,§,§ / B,§ / §,§
Scales back? Mostly standardised (not maker’s) symbols for scales on back of stock e.g. S = sine (5° to 90° & 85° to 0°) or sin(x) but § = generic symbol for any non-standard scale. Scales between solidi (/ /) are on the back of the slide(s). A / B,§ / §,§
Cursor type? Basic description (incl. material) + no. of hairlines, etc on any cursor(s) or alternative to a cursor - e.g. a stylus none - not needed
Condition? Cn where n = 0-6 based on Herman van Herwijnen’s condition/quality scale C3
Date? YYYY for year(s) of production or an approximation/range of years 1900s
Extras? Basic description of any accessories - e.g. case or stand + where relevant, an accreditation for image, etc
Instructions? Details like “on back of rule” and/or language of instruction sheet/booklet - generic or instructions for common layouts usually not listed English (UKSRC reprint)
Comments ? Any special or noteworthy traits + significant use-related facts + pertinent details of scales/tables in well of stock + any significant tables, etc on the back of the stock

No. 1075 for helping publicans/innkeepers calculate over/under proof alcohol, gauging, blending, stocktaking, discount and profit + altimeter top-edge cm scale for height of liquid in a standing bottle - early Liverpool address

Special C scale when used with either D, E, or F = amount of liquid in a barrel - G & H scales + Reducing scale = amount of water to add to a given amount of spirits to reduce it’s proof (alcohol content) to a desired amount, or the amount of spirits that must be added to raise the proof - I & J scales give value of spirits if the proof is raised or lowered. I & K scales give profits or discounts on sales/cost

In-Out? MM-YYYY / MM-YYYY of the date added/left the collection or <YYYY if exact MM-YYYY no longer known 10-2018/

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ModelType
Publicans' Rule Standard for Licensed Victuallers
Wine & Spirit Merchants' Rule Desktop Standard for Wine & Spirit Trade