Newsletter PLUS
Issue 2021 No 10
A Norma Flyer
Issue 2021 No 10
Eureka Slide Rule
Issue 2021 No 11
Smiths Lathework Calculator
Issue 2021 No 12
Board of Trade Hydrometer
Issue 2021 No 14
Nash Logoscope
Issue 2021 No 14
French Engineer's Slide Rule
Issue 2021 No 15
Slide Rule Instructions
Issue 2021 No 17
Soho Slide Rule
Issue 2021 No 19
Dialling Beam Compass
Issue 2021 No 20
Chemical Predictor
Issue 2021 No 21
Thomson's Lunar Corrector
Issue 2021 No 21
The Mighty Colossus
Issue 2022 No 22
Ernst Sokopf Address Book
Issue 2022 No 22
The German Patents
Issue 2022 No 22
Slide Rule Muldi
Issue 2022 No 22
Forestier Rule
Issue 2022 No 22
Thomson's Lunar Rule
Issue 2022 No 22
Amsler Patent Planimeter
Issue 2022 No 25
System Klepek
Issue 2022 No 27
Blackwell Speed Calculator
Issue 2022 No 27
Stanley Ivory 4-fold
Issue 2022 No 28
Pioneer
Issue 2022 No 29
Engineer Planimeters
Issue 2022 No 32
Kingson Instructions
Issue 2022 No 32
Ship's Distance
Issue 2022 No 33
Ferrite Core Memory
Issue 2023 No 34
Aristo 50111
Issue 2023 No 34
Calculating with Tones
Issue 2023 No 34
Barnard Patent Calculator
Issue 2023 No 35
German Planimeter
Issue 2023 No 35
Updated Calculating with Tones
Issue 2023 No 35
Years (25) of International Meetings
Issue 2023 No 35
2-Foot, 2-Folding Rules
Issue 2023 No 36
Falling Asleep!
Issue 2023 No 36
Gauging Rule
Issue 2023 No 36
Relay
Issue 2023 No 37
Thornton 1448 Navigation Manual
Issue 2023 No 38
Transistorised Computers
Issue 2023 No 39
Unusual Unique Instructions
Issue 2023 No 40
Davis of Derby (Sundials)
Issue 2023 No 41
Halden Catalogue
Issue 2023 No 41
Video of Junk Box
Issue 2023 No 42
S-System
Issue 2023 No 42
Marks Patent 1885
Issue 2023 No 44
Takeover of Marconi
Issue 2023 No 45
Fisher Leaflet and Instructions
Issue 2023 No 45
Arithmeum exhibition
Issue 2023 No 45
Racing Certainty Slide Rule
Issue 2024 No 46
Festus/Acu-Rule G-W Photo slide rule
Issue 2024 No 48
Polarkoordinaten
Issue 2024 No 48
Werkmeister's Article
Issue 2024 No 48
Lionel Best Patent
Issue 2024 No 48
Golden Ratio
Issue 2024 No 49
K&E Newsletter
Issue 2024 No 49
Patent for Measuring Area
Issue 2024 No 50
US Patent 712983
Issue 2024 No 50
US Patent 3383771
Issue 2024 No 52
Thornton PIC 1448 instructions
Issue 2024 No 52
BriCal Manual
Issue 2024 No 52
Alteneder Micro Rule
Issue 2024 No 52
E.H. Bristol Planimeter Patent
Issue 2024 No 52
E.S. Prime Wantage-Rod Patent
Issue 2024 No 52
Zeiss Optical Slide Rule
Issue 2024 No 52
A. Werber-Schneider Swiss Patent
Issue 2024 No 53
Fowler Nautical Calculator Manual
Issue 2024 No 53
US Patent 854762A
Issue 2024 No 53
The Carpenter's Rule
Issue 2024 No 53
US Patent 75322
Issue 2024 No 53
Popular Distance Finder
Issue 2024 No 53
Swiss Patent CH8873A
Issue 2024 No 54
Micrometeorites
Issue 2024 No 55
VIM 2024
Issue 2024 No 56
Griffin Horse Power Instructions
Issue 2024 No 56
Albert Nestler, System Peter
Issue 2024 No 56
Meteorological Patent
Issue 2024 No 56
Negretti & Zambra Weather Watch
Issue 2024 No 57
Braille Micrometer Patent