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.

  
 
25cm  HEMMI No. 260 DUPLEX TYPE
 

No. 260 Leather Case

The scales of Hemmi slide rules have been especially designed and arranged for efficient use by experienced engineers and incorporate the following special features:

(1) EFFICIENT MULTIPLICATION AND DIVISION
Since the rule is equipped with DF, CF and CIF scales, the troublesome interchanging of indices is unnecessary.

(2) PERFECT EXPONENTIAL CALCULATION
Eight LL scales are provided to make A x type calculations possible even when A is a decimal fraction and x has a negative value.

(3) RIGHT TRIANGLES AND VECTORS CAN BE EASILY CALCULATED
Since the "Ritez" system is employed in the trigonometric function scales and complementary angles are printed in red, right triangle and vector calculations are easier than ever. Right triangles, vector, and complex number calculations can be simplified by using these scales in conjunction with the DI scale.

(4) In addition to all the special features listed above , the No. 260 slide rule is also equipped with the P scale to facilitate  the determination of cosθ , √1-x², and other calculations by merely setting the indicator.

   

 
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