Rails and Roads By the Slide Rule
A 1908 guide to laying out tracks using the Mannheim, and a more modern rule for smoothing out those curves.
Following the Rules
An attempt to introduce to others the 350-year history of the slide rule, its various uses and functions, and the fun of collecting these vintage items.
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Silicon Slide Charts and Rules
Chronicling several specialized slide charts and slide rules that inadvertently helped bring about the end of the slide rule era.
A K&E Timeline Study Update
Developing insights into Keuffel & Esser slide rule manufacturing dates and serial numbers
Rocket Science Slide Charts
Slide charts fit for a space race!
Do You Need an Anido? ( Slide rule, that is)
An attempt 100 years ago to improve the computation of raising numbers to powers without using Log-Log scales.
George Washington Richardson
A Chicago slide rule icon, Richardson made his stock Aluminum slide rules in his home's basement, advertised them in Popular Mechanics magazine, and built a solid reputation in the early 1900s.
New Rules for Summer
Now that the Indy 500 is past us, we can get on with summer.
Optimal Opps
Finding optimal ratios for conversion factors on slide rules
More on Blackbody Slide Rules
An examination of the standard "Model 17" effected by Pickett in 1970 and re-produced by Perrygraf in 2014, with comparisons to the popular slide charts.
The Short Baseline Triangulation Slide Rule
This K&E model for basic triangulation was a precursor to their later "Military Rule"