Paper
Scales were soon replaced with paint, Model
50
|
End
view of model 50 milling
pattern |
| G-W
Photo slide rule made by Acu-Rule |
Early
Acu-Rule boxes |
| Acumath
model 4 slide rule |
Acumath
model 90A |
| Packaging
for D. Van Nostrand
slide rules |
New
style of Mannheim manuals |
The
C. V. Ore slide
rule is a mystery slide rule.
|
Retail
price list of 1939 for first production Acu-Rule |
| G.
L. Lockhart Concrete
Volume slide rule |
A
series of Log/Log
rules |
| Acu-Rule
produced a wood rule for
Dietzgen |
Announcement
of new metal core
rules |
|
|