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Details of: Thornton A.G. / P.I.C. / British - PIC Junior

Type? A generic name (e.g. Rietz) or function/use for specialist models (e.g. Meteorology) for grouping similar models across makers. If not “standard” 25cm linear length, preceded by the form (i.e. Demonstration, Desktop, Pocket, Waistcoat, Keyring, Lilliput or Book) + if needed, qualification to distinguish between versions (e.g. early or late). School Mannheim
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 Closed/solid frame
Material? Basic description: ivory/bone/wood/bakelite/plastic/metal/cardboard or combinations e.g. wood/veneered, wood/painted, etc wood/celluloid veneer
Length? Mostly the linear length of the D scale (in cm or inches) excluding any extensions. For circular/watch slide rules it is the diameter but for helical/tubular/drum slide rules it is the overall scale length. For other calculating aids it is the physical length. 10"
Scales front? 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 A / B,C / D
Scales back? 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 / S,L,T /
Cursor type? Basic description (incl. material) + no. of hairlines, etc on any cursor(s) or alternative to a cursor - e.g. a stylus mtetal/plastic - 1 hairline
Condition? Cn where n = 0-6  condition/quality scale where 0 = brand new in box & 6 = broken   C4
Date? YYYY for year(s) of production or an approximation/range of years <1937 (British Made)
Extras? Basic description of any accessories - e.g. case or stand + where relevant, an accreditation for image, etc red cloth covered carboard case
Instructions? Details like “on back of rule” and/or language of instruction sheet/booklet - generic or instructions for common layouts usually not listed
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

wooden back

In-Out? MM-YYYY / MM-YYYY of the date added/left the collection or <YYYY if exact MM-YYYY no longer known <2005

All of:  Thornton A.G. / P.I.C. / British new search?

ModelType
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PIC 111/PC 8 Differential Rietz
PIC 112 Desktop Differential Rietz
PIC 120 Pocket Differential Log-Log
PIC 121/PC 18 Differential Log-Log
PIC 122 Desktop Differential Log-Log
PIC 131 Differential Electro
PIC 131/PC 18 Differential Electro
PIC 132 Desktop Differential Electro
PIC 141 (Model E) A.C. Electrical Electro
PIC 144 (Model F) A.C. Electrical Electro
PIC 221 Differential Comprehensive Log-Log
PIC 241 Differential Log-Log
PIC 271 School Differential Log-Log
PIC F 3649 Log-Log
PIC F 3651 Desktop Electrical & Mechanical Engineer Electro
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PIC F 3658 School Mannheim
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