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Wayne Harrison's Slide Rules
Home
Change Log
Items from my collection
Slide Charts and Specialized calculators
Advertising (Gift) slide rules
Unusual Slide Rules
Slide rule as a status item
Making Slide Rules at home
Materials
Sizing Printed scales to fit what you have
Sample build
The Steffens method
Newer techniques
Replica SR Scales
Gilson Atlas Calculator
Bygrave Position Line Calculator
Goodchild Mathematical Chart
Omnimetre Project
The Fuller Project
Fuller Type 1
Fuller Type 2
Whythe Complex Calculator
The Loga Project
The Nystrom Calculator
Build Diary
The Thacher Calculator
Pre-19th century SR Replicas
Literature on early slide rules and related instruments
The Circle of Proportions and the Horizontal Instrument
Oughtred's Circles of Proportions
The puzzling Constellation scale
The month scale and the Julian Calendar
Oughtred's Horizontal Instrument
Building and testing
Replicas made from Patents
1892 - GM Andrews calculating instrument
The turn counting problem
L scales on spiral models
1896 - J Michaelson's computing instrument
1912 - Lilly's improved spiral Calculator
1947 - The MacDonald Logarithmic Spiral Rule
Patent US2426362 details and claims
Build your own Macdonald calculator
Operating instructions for the Macdonald Calculator
Important Terms
Log Spiral Problem 1
Log Spiral Problem 2
Log Spiral Problem 3
Math behind the Log spiral
The Verniers
1969 - Hexadecimal Slide Rule
Wayne Harrison's Slide Rules
Fuller Type 2
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