Hyperbolic Match Output

Number:28

Maker:FABER-CASTELL (Germany)

Model:Mathema No. 2/84N

PHOTO

Scales Front: Left Front: (e^Xg),tan x^g,sqrt(X²-1),sqrt X, || sqrt X, (1 / sqrt X), 1/y, y || Y, sqrt( 1 - X²), sin X^g, (e^X) ||
Right Front: || ^gln Y, ^gtanY, sqrt(1 + Y²), Y² || y², 1/y², 1/y, y || Y, sqrt(1 - Y²), ^gsinY, (lnY) ||

Scales Back: Left Back: || 10 ln X, ln X, 0.1 ln X, Y || y, 0.1 cosh x^g, 0.1 sinh x^g, sinh x^g || tanh x^g, -0.1 ln X, -ln X, -10 ln X ||
Right Back:|| e^0.1Y, e^Y, e^10Y , Y || y, ^gcosh 10y, ^gsinh 10y, ^gsinh y || ^gtanh y, e^-10Y , e^-Y, e^-0,1Y ||

Gauge Marks:

Cursor Front: Under the upper two sqrt X scales are two lines to the left at 2π and π/4. To the right are two lines at 4π and π/2. These symbols were printed above on the cursor.

Cursor Back: Under both the the upper and lower scales are two lines at left at 2π and π/4. To the right are two marks at 4π and π/2. These symbols were printed above and below on cursor.

Construction: 20 cm.; Plastic, Cursor is not framed. Adjustable metal brackets.

Date:

Source: Rod Lovett Collection

Information: This is based on 400^g system. Where, 400^g = 2&pi. Then, 100= π/2, and 1^g= π/200. 1 Rad = 200^g/π = 63.66198^g. π = usual value = 3.1415927