The following is one in a series of intermittent excerpts from Coma residents’ blogs published by Coma News as a community service.
This slide rule appears to be from the late 1940s. I was told by a slide rule collector that it is a model SR-109 made by the Roos Company or the Charvoz-Roos Company (which ceased to exist in 1949), and it is in excellent condition for one of their slide rules.
The slide rule has a case, which is not in real great shape and is embarrassing to the slide rule.
Unfortunately I am not a slide rule collector or I would keep this slide rule. If I keep him he will presumably sit in a drawer collecting dust forever in the desk where I keep my computer and calculator.
What’s that- you say you don’t know how to use a slide rule? Well fret not- I am also including the book “Practical Use of the Slide Rule”, by Barnes and Noble, dated 1947. And I guarantee that slide rules still work exactly the same as they did in 1947!
In the unlikely event that there aren’t multiple interested Freecyclers, let me know why you would be the best owner of this fantastic, highly environmental (non-electric-using) computational device.