Hyperbolic Match Output
Maker:PICKETT & ECKEL (USA)
Model: No. 4 Vector Hyperbolic Log Log
Scales Front: ||Three cube root scales 3 √, DF|| CF, T&T, ST, S&S, CI, C || D, DI, Two sqrt scales √ ||
Scales Back: || 1/N1, 1/N2, 1/N3, 1/N4, DF/M || CF/M, Th, Sh, Sh, CI, C || C0 & D, N1, N2, N3, N4 ||
Gauge Marks: π is on C, D. Also, CF, DF on the front scales. R is shown on front C and D; marks 1° , ' and " are on ST
Construction: 25 cm.; White plastic film over Magnesium alloy, Cursor is not framed, Adjustable metal brackets.
Source: MOL and WKR