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slide rules made of wood and plastic
Close-up of plastic parts printed on a 3D printer, round letters rings for cryptex
group of old slide rule slipstick analogue computer for mathematical calcululs, close view
Bolt in green-painted steel bridge illustrating infrastructure at its most basic
Armillary Sphere - Astrolabe Globe
A brass band spring from a 150 year old clock. On a black background with some copy space. Selective focus on the center of the spring.
Metal gears and cogs mechanism with numbers
Representing the passage of time, close-up of a sundial in the Cuban municipality of Rafael Freyre which is situated in Holguin Province.
Time lines in an abstract spiral
Silver Bar
Close-up of brass cryptex invented by Leonardo da Vinci from the book da vinci code. Word creativity as password set by letters rings. Cryptographic equipment printed on a 3D printer
giant steel saw blade
The slide rule is an instrument of analog computing, which exploits the properties of logarithms, returning more complex operations (products, quotients, exponentials) to simpler operations on logarithms of their operands. These are carried out graphically by moving one or more rods graduated with a logarithmic scale.
Industrial saw
Oxygen word set up as a password to combination puzzle box (cryptex) with rings of letters; young lady guess the secret code. closeup on black background. Secret message, keyword, passcode puzzle concept.
Number 5000 Pattern Design on Banknote
close-up of electronic machine parts, digit indicator numbers
heater fan close up
Number thirteen on a tailor's tape measure close up
Set of unpainted Russian doll shapes make an abstract concentric pattern of circles.
Chinese feng shui compass.Feng shui compass (Luopan).antique chinese compass for feng shui
Mechanical counter
an iron chain illuminated in the dark
Aluminum Sheets
Chinese traditional silver jewelry processing die
Electric machinery
tools used by a mathematician to evaluate numbers calculator and a slide rule
Full frame photo of metal surface
scale handle of carriage of metal lathe machine in turning workshop
SPIRAL OF THE BODY OF A SCREW VERTICALLY ON OUTDATED WALL
Free Images: "bestof:Jones & Laughlin Steel Corp., Coil Weight Calculator - MIT Slide Rule Collection - DSC03642.JPG en MIT Slide Rule Collection MIT Museum Cambridge Massachusetts"
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