Baroque bell tower
La Merced
Maria had a little lamb (Explored)
Photobombing llama (Explored)
Greetings from Cuzco (Explored)
Orb of the Iglesia (Explored)
Two cows in the Andes Mountains
A farming community in the Andes (Explored)
Farmstead in the Sacred Valley of the Incas
In the shadow of Nevado Salcantay
Festive orb
Three burros
Farming in the Sacred Valley
Coming down the mountain (Explored)
Happy Holidays (Explored)
Incan crop terraces
Moray circles
Snowflake.4
Farewell to Nevado Salcantay (Explored)
The poetry recitation
Chinchero Orb (Explored)
Midday hours
Braids
The shopkeeper
The door knocker
Brightly colored peppers
Neon Waves (Explored)
Wendi's Orb (Explored)
Battle of the paperclips (Explored)
As dawn breaks
Red lines/gray lines
Shadows approach (Explored)
Snowcaps and clouds
Center of a small town (Explored)
Join the parade
Plowing with oxen
Orb - Farewell to Autumn
Orb - Autumnal bliss
Of birds, butterflies and flowers (Explored)
The tympanist (Explored)
Wheee! (Explored)
Look into my eyes
The start of the routine (Explored)
Weightless
Concentration
See also...
Sujet en couleur sur fond noir - Topic in color on black background
Sujet en couleur sur fond noir - Topic in color on black background
Keywords
Authorizations, license
-
Visible by: Everyone -
All rights reserved
-
659 visits
Log log duplex vector (Explored)


The slide rule was developed in the 17th century, but its modern version dates from the mid-1800's. It was eventually displaced by the pocket calculator starting in the late 1960's. However, it was still used on Apollo missions in the 1970's.
Using the various scales on both sides, one could solve problems involving multiplication, division, square and cube roots, plane and hyperbolic trigonometry, logarithms, and numbers raised to a power.
This particular slide rule, the Keuffel & Esser log log duplex vector, came with a 132 page manual (http://www.mccoys-kecatalogs.com/KEManuals/4081-3_1955/4081-3_1955.pdf) and a 49 page supplemental manual www.mccoys-kecatalogs.com/KEManuals/4083-3/4083manual.pdf. If you think that camera manuals are difficult to read, try a slide rule manual.
The Sunday Challenge: Numbers
AIMG 4523
Using the various scales on both sides, one could solve problems involving multiplication, division, square and cube roots, plane and hyperbolic trigonometry, logarithms, and numbers raised to a power.
This particular slide rule, the Keuffel & Esser log log duplex vector, came with a 132 page manual (http://www.mccoys-kecatalogs.com/KEManuals/4081-3_1955/4081-3_1955.pdf) and a 49 page supplemental manual www.mccoys-kecatalogs.com/KEManuals/4083-3/4083manual.pdf. If you think that camera manuals are difficult to read, try a slide rule manual.
The Sunday Challenge: Numbers
AIMG 4523
, Jan Klimczak, , Rafael and 33 other people have particularly liked this photo
- Keyboard shortcuts:
Jump to top
RSS feed- Latest comments - Subscribe to the comment feeds of this photo
- ipernity © 2007-2025
- Help & Contact
|
Club news
|
About ipernity
|
History |
ipernity Club & Prices |
Guide of good conduct
Donate | Group guidelines | Privacy policy | Terms of use | Statutes | In memoria -
Facebook
Twitter
I agree about the User instructions.
LOL
ઇઉ.¸¸.* ઇઉ.¸¸.*Amazing composition!!
Admired in:
www.ipernity.com/group/tolerance
... I am so bad in mathematical ! (:o(((((
In his time the class teacher was such a rule,
but larger and frightened us with pretending to hit us.
Sign-in to write a comment.