For over 50 years ago, De Leon Import & Export Corporation distributed the ideal slide rules acceptable for all markets in the world. Hemmi Bamboo Slide Rules were supplied to students and professionals in the Philippines by the company and today, continues to distribute modern and efficient instruments to an array of specialized fields.

After steady research for many years, Hemmi Bamboo Slide Rule Manufacturing Company finally reached to a top level of technique assuring to make the slide rules of excellent quality applicable for all purposes of calculation.

Now, we have the pleasure of recalling just a few of the important properties on Hemmi Bamboo Slide Rules.

  
 
 DUPLEX 25cm HEMMI No. P261
 

Front Face

LL01
Log Log Scale : range : 0.09~0.905      e-0.01x
LL02
Log Log Scale:  range : 0.905~ 1/e      e-0.01x
LL03
Log Log Scale: range : 1/e~0.00004     e-x
DF
Folded Scale: Folded at     ∏               ∏x
CF
Folded Scale: Folded at     ∏               ∏x1
CIF
Folded Scale:  folded at    1/∏             1/ ∏x1
CI
Reciprocal Scale                                1/x1
C
Fundamental Scale                             x1
D
Fundamental Scale                             x
LL3
Log Log Scale : range : e~22000          ex
LL2
Log Log Scale : range : 1.105~e          e0.1x
C
Fundamental Scale                             x1

Back Face

T
Tangent : 6° ~ 45° , Cotangent : 45° ~ 84°               
ST
Sine : 0.6°~6°, Tangent : 84°~89.4°
K
Three Cycled Scale                                     x3
A
Two Cycled Scale                                       x2
B
Two Cycled Scale                                       x12
BI
Reciprocal Two Cycled Scale                        1/x12
CI
Reciprocal Scale                                         1/x1
C
Fundamental Scale                                      x1
D
Fundamental Scale                                      x
L
Logarithms                                                log10x
P
Pythagoras                                                √1-x2
S
Sine, Cosine :6°~90° , Cosine : 0° ~84°

 

 
   

 
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