a- L: 28.0cm W: 3.2cm H: 1.0cm
b- L: 28.0cm W: 1.5cm H: 0.5cm
c- L: 17.6cm W: 3.8cm H: 1.7cm
d- L: 16.3cm W: 3.8cm H: 1.7cm
A wooden slide rule and its carrying case.
a- The ruler is rectangular and is 11 inches long. The top edge protrudes slightly form the rest of the body. The front of the body is covered in an ivory white veneer with extensive measurement markings. The slide (b) runs down the centre of the front face of the body.
b- The slide is a narrow strip of wood. It is covered in an ivory-white veneer with extensive markings. The sides protrude slightly to fit snugly into the ruler.
c- The bottom of the carrying case. It is rectangular and made of cardboard covered in a black oilcloth. The top portion is narrower so the lid can sit on top.
d- The lid of the carrying case. It is rectangular and made of cardboard covered in black oilcloth. It slides onto the top of the carrying case.
Slide rules are analog computing devices. They feature lots of different scales that can be compared at a glance. The moving slide is double-sided, offering more scales and calculations. Slide rules are colloquially called “Slipsticks” or “Architect’s slides” because they are often used by architects when making models and determining size scales.
