Generic name (e.g. Enhanced Mannheim) or function/use for special models (e.g. Meteorology). If not the “standard” 25cm linear length proceeded by the form (e.g. Demonstration, Desktop, Pocket, Waistcoat, Lilliput or Book) + suffix when needed to distinguish between different versions (e.g. early or late).
||4-sided Alcohol Gauging poly-slide(4)|
L/C/D/T/W/X where L=Linear, C=circular, D=Drum, T=tubular, W=watch, X=miscellaneous (i.e. the rest)
Basic construction form of the body i.e. Closed/solid frame or Open frame or Duplex or Other
Basic description: ivory/bone/wood/bakelite/plastic/metal/cardboard or combinations e.g. wood/veneered, wood/painted, etc
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.
Standard (not maker’s) symbols for scales on front face e.g. A = X² (1-100) but § = generic symbol (signum sectiōnis) for any non-standard scale + scales between solidi / / are on the slide(s) whereas scales after vertical line | or after reversed solidus \ are on a straight or bevelled top or bottom side edge
||Face "A": D / C,C / § | Face "B" Segt. St.: § / C,C / §|
Standard (not maker’s) symbols for scales on back face e.g. S = sine (5° to 90° & 85° to 0°) or sin(x) but § = generic symbol (signum sectiōnis) for any non-standard scale + scales between solidi / / are on the back of slide(s) but scales listed after / / - notation are on another surface e.g. back of stock or inside a lid
||Face "C": § / C,C / § | Face "D" Segt. Ly.: § / C,C / §|
Basic description (incl. material) + no. of hairlines, etc on any cursor(s) or alternative to a cursor - e.g. a stylus
||none - not needed|
Cn where n = 0-6 based on Herman van Herwijnen’s condition/quality scale
YYYY for year(s) of production or an approximation/range of years
Basic description of any accessories - e.g. case or stand + where relevant, an accreditation for image, etc
Details like “on back of rule” and/or language of instruction sheet/booklet - generic or instructions for common layouts usually not listed
||English - gauge points & gauge marks courtesy Jane & Mark Rees|
Downloadable .PDF copy of unusual or uncommon model specific instructions
| 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
Post 1824 because of Imperial based units/gauge marks + back of slide Face “A” = Divisors for various liquids + back of slide Face “B” = scales for correcting calculations for spheroid casks & other models + back of slide Face “C” = more Divisors + back of slide Face “D” = blank
MM-YYYY / MM-YYYY of the date added/left the collection or <YYYY if exact MM-YYYY no longer known