-
Welcome back Guest! Did you know you can mentor other members here at H-M? If not, please check out our Relaunch of Hobby Machinist Mentoring Program!
- Joined
- Oct 13, 2014
- Messages
- 9,631
I still have a slide rule in a leather holster, somewhere...
- Joined
- Feb 1, 2015
- Messages
- 9,978
My old Picket slide rule sits next to my desk. The adjustable magnesium frame and adjustable cursor made for exceptional accuracy and smoothness. I routinely worked to better than .1% with it. I also had a leather holster with a clip for my belt and the slide rule went everywhere with me. When I needed more accuracy, I had my 12th edition CRC Math Handbook with 5 place log and trig tables. There are twenty pages required for the 5 place log tables. Each additional decimal place requires 10x the number of pages. The scientific calculator in my phone has 10 decimal places. were I replacing it with log tables, I would need a set of volumes containing 2 million pages.
The first electronic calculators became available in 1970. My first calculator was a four banger with a 1/4" high display. The following year I got a TI SR50. I quit carrying the slide rule after that.
The first electronic calculators became available in 1970. My first calculator was a four banger with a 1/4" high display. The following year I got a TI SR50. I quit carrying the slide rule after that.
