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 10"  HEMMI No. 257
For Chemical Engineering
 

No. 257 Leather Case

Designed for quick solution to various calculations in chemical engineering
Scales
Uses
L
Common logarithm
A
Square & Square Root
DF, CF, CIF (Pi-folded), D, C, CI
Mutliplication, Division & Proportion
L3, LL2, LL1
Exponent
Ch
Atomic & Molecular Weight
M1, M2m Xw, X
Conversion of concentration units & liquid-vapor equilibrium relation of two-component ideal system
T
Fahrenheit, Centrigrade, Kelcin temperature
F (t)
Adiabatic expansion & compression
P
Pressure
tw
Saturated temperature of steam

   

 
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