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08-14-2016, 05:35 PM
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#121
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Give me a museum and I'll fill it. (Picasso) Give me a forum ...
Join Date: Dec 2004
Location: the City of Subdued Excitement
Posts: 5,588
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FYI, slide rules are valuable antiques these days. Do not throw them out.
Sent from my SM-G900V using Early Retirement Forum mobile app
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I have outlived most of the people I don't like and I am working on the rest.
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08-14-2016, 05:56 PM
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#122
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Give me a museum and I'll fill it. (Picasso) Give me a forum ...
Join Date: Mar 2016
Posts: 8,968
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You don't need slide rules for math, you need them for science. Long strings of calculations used in electronics and chemistry and physics.
The concept is multiplication can be done by the addition of logarithms.
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08-14-2016, 08:39 PM
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#123
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Thinks s/he gets paid by the post
Join Date: Feb 2010
Location: Cavalier
Posts: 2,317
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Quote:
Originally Posted by Ed_The_Gypsy
FYI, slide rules are valuable antiques these days. Do not throw them out.
Sent from my SM-G900V using Early Retirement Forum mobile app
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That had never occured to me. I have a nice K&E slide rule from college days. I think I bought it in 1966 and at the time thought it was outrageously expensive at, if I remember correctly, $20.
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"Don't take life so serious, son. It ain't nohow permanent." Pogo Possum (Walt Kelly)
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08-15-2016, 10:07 AM
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#124
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Moderator
Join Date: Dec 2007
Location: Eastern WV Panhandle
Posts: 25,340
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Quote:
Originally Posted by Ed_The_Gypsy
FYI, slide rules are valuable antiques these days. Do not throw them out.
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Interesting. There were so many of them, and they take so little space, that I'd think they'd be commonplace even now. I inherited what I think is a nice one that was my father's. It's in a nice leather case and is about three feet long. I haven't the foggiest idea of how to use it.
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When I was a kid I wanted to be older. This is not what I expected.
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08-15-2016, 10:13 AM
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#125
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Thinks s/he gets paid by the post
Join Date: Mar 2010
Location: Kerrville,Tx
Posts: 3,361
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Quote:
Originally Posted by Walt34
Interesting. There were so many of them, and they take so little space, that I'd think they'd be commonplace even now. I inherited what I think is a nice one that was my father's. It's in a nice leather case and is about three feet long. I haven't the foggiest idea of how to use it.
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Here is a nice link from hp that explains slide rule use. Basic Slide Rule Instructions
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08-15-2016, 10:18 AM
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#126
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Moderator
Join Date: Dec 2007
Location: Eastern WV Panhandle
Posts: 25,340
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Quote:
Originally Posted by meierlde
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Thanks. I bookmarked it and will study later when at home and can practice. Higher math stuff is not my strong point and on the list of "World's Greatest Inventions" I think electronic calculators are right up there near canned beer.
__________________
When I was a kid I wanted to be older. This is not what I expected.
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08-15-2016, 11:00 AM
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#127
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Give me a museum and I'll fill it. (Picasso) Give me a forum ...
Join Date: Jan 2006
Location: Rio Grande Valley
Posts: 38,145
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I remember studying logarithms and doing exercises with logarithm tables when I was in ninth grade. Good thing that when I went to engineering school they allowed calculators. They made a big deal of it - ours was the first freshman class allowed to use them.
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Retired since summer 1999.
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08-15-2016, 12:20 PM
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#128
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Thinks s/he gets paid by the post
Join Date: Dec 2005
Location: Lake Livingston, Tx
Posts: 4,204
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I think this form of slide rule is still in use! I'm sure there are more than a few people here that have one.
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If it is after 5:00 when I post I reserve the right to disavow anything I posted.
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08-15-2016, 06:11 PM
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#129
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Administrator
Join Date: Apr 2006
Posts: 23,038
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I used a circular slide rule during my days as a submariner. We wore them around our necks with a shoestring through the center hole. Back then, the fire control system was very primitive and we did a lot of manual calculations to track targets and shoot torpedoes.
__________________
Living an analog life in the Digital Age.
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08-15-2016, 06:57 PM
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#130
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Moderator Emeritus
Join Date: Aug 2007
Location: Northern Illinois
Posts: 16,600
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Cursive Writing?
People will regret giving up old time "technology". I was the last one at work who could read the cursive writing in old deeds, and use any type of survey equipment that didn't require batteries. I'm afraid that future generations won't understand the fundamentals behind the new technologies. I've never seen the round slide rule. My straight one is on display with the other old instruments at my former workplace. I need to get it back.
Sent from my iPad using Early Retirement Forum
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08-15-2016, 07:08 PM
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#131
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Give me a museum and I'll fill it. (Picasso) Give me a forum ...
Join Date: Mar 2016
Posts: 8,968
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Round ones are cool because they are smaller, but you pay the price with the "inner scales"
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08-19-2016, 09:59 PM
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#132
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Give me a museum and I'll fill it. (Picasso) Give me a forum ...
Join Date: Dec 2004
Location: the City of Subdued Excitement
Posts: 5,588
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Quote:
Originally Posted by Walt34
Interesting. There were so many of them, and they take so little space, that I'd think they'd be commonplace even now. I inherited what I think is a nice one that was my father's. It's in a nice leather case and is about three feet long. I haven't the foggiest idea of how to use it.
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I will give you $5 for it.
Sent from my SM-G900V using Early Retirement Forum mobile app
__________________
I have outlived most of the people I don't like and I am working on the rest.
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08-20-2016, 01:05 PM
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#133
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Moderator
Join Date: Dec 2007
Location: Eastern WV Panhandle
Posts: 25,340
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Quote:
Originally Posted by Ed_The_Gypsy
I will give you $5 for it.
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No thanks. I'm waiting for it to become a priceless heirloom.
__________________
When I was a kid I wanted to be older. This is not what I expected.
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08-20-2016, 02:59 PM
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#134
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Thinks s/he gets paid by the post
Join Date: Oct 2009
Posts: 2,010
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To me the value of circular slide rules is never having to run off the scale. You don't have that error to deal with.
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You do not have a soul. You are a soul. You have a body.
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08-20-2016, 04:45 PM
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#135
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Moderator
Join Date: Feb 2010
Location: Flyover country
Posts: 25,356
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Quote:
Originally Posted by Ronstar
I was the last one at work who could read the cursive writing in old deeds
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Still, that sort of thing can be learned.
When I started doing some genealogical research, I ran up against old German script that was completely unreadable to me. But I found a website with a tutorial for deciphering this sort of script. It's still hard work to figure it out, but at least it's possible.
For example:
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08-20-2016, 06:48 PM
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#136
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Thinks s/he gets paid by the post
Join Date: Dec 2005
Location: Lake Livingston, Tx
Posts: 4,204
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Ok, I'll bite! What's it say
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If it is after 5:00 when I post I reserve the right to disavow anything I posted.
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08-20-2016, 07:19 PM
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#137
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Give me a museum and I'll fill it. (Picasso) Give me a forum ...
Join Date: May 2011
Posts: 8,368
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"If you can read this, you're too close"?
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"Exit, pursued by a bear."
The Winter's Tale, William Shakespeare
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08-20-2016, 08:31 PM
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#138
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Full time employment: Posting here.
Join Date: Jul 2013
Posts: 953
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Quote:
Originally Posted by Walt34
Thanks. I bookmarked it and will study later when at home and can practice. Higher math stuff is not my strong point ...
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OK Walt, here is an easy one.
you plus 2 of your bodies go to the early bird special. The Entree Combo is 13.95, and includes your drink. Sales tax is 6.5%. You wish to leave an 18% tip. How much do you leave on the table?
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08-21-2016, 12:17 PM
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#140
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Moderator
Join Date: Dec 2007
Location: Eastern WV Panhandle
Posts: 25,340
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Quote:
Originally Posted by Clone
OK Walt, here is an easy one.
you plus 2 of your bodies go to the early bird special. The Entree Combo is 13.95, and includes your drink. Sales tax is 6.5%. You wish to leave an 18% tip. How much do you leave on the table?
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Well, since I'm only paying for my own meal, and not tipping on the sales tax, the 18% tip would be 2.5, rounded down from 2.511. Confession: I did it with a calculator. Looking at the slide rule I got cross-eyed.
__________________
When I was a kid I wanted to be older. This is not what I expected.
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