| Manufacturer: |
Sun Hemmi |
| Country of Manufacture: |
Japan |
| Type: |
255D |
| Number: |
Y1 |
| Date of Manufacture: |
|
| Scales: (Front) |
Sh1, Sh2, Th, A [ B, TI2, TI1, SI, C] D, DI, radians, theta |
| Scales: (Back) |
L, K, DF [CF, CIF, CI, C] D, LL3, LL2, LL1 |
| Number of Scales: |
24 |
| Gauge Points: |
π, C, q', e |
| Slide Rule made from: |
Bamboo and Plastic |
| Cursor made from: |
Plastic |
| Cursor Lines: |
1 front, 1 back |
| Overall Length of Rule: |
32.1 cm |
| Length of Scales: |
25 cm |
| Width: |
4.5 cm |
| Depth: |
0.7 cm |
| Weight: |
137 gm |
| Acquired from: |
Ted Hume |
| Date: |
Jan 2001 |
| Condition: |
Good |
| Accessories: |
Leather case. Good condition
|
| Comments: |
JOS Vol 9, No. 2
"The Sun Hemmi System of Trigonometric
and Hyperbolic Scales"
Borchers and Cotter
|