What has changed beyond recognition

Things have changed beyond recognition
By the beginning of the new, of the twentieth century, the United States already in full riding on roller skates, which by their configuration and design were partly similar to today's. In Sweden and Denmark, the popularity gained pedal rollers Takypod, invented by Edward Petrini. Surprisingly, it looks very modern - could be sold in a store with some Segway.





In 1956, IBM introduced its first drive on the hard disk. He weighed more than a ton and stored five megabytes of data. Should come down to a half-century weakest iPhone 5S weighs 112 grams and has 16 gigabytes of memory - about 3,200 times more.



It looked like American life jackets for the men - or rather, rescue mattresses - in 1917.



One of the first mass calculators Marchant XLA (1913). In such a pocket will not put. Adapted for the big shops and purchased for sellers of large department stores and cashiers banking institutions. Attached is a separate instruction for 130 pages.



One of the first American brand of washing machines with electric drive Thor (1908). The vehicle had a wooden drum, which in turn made 8 rotations clockwise and 8 against. To connect the drum to the motor shaft, had a small arm.



The first lawn mower (1916) as eskperimenta weeks used in the Missouri Botanical Garden. It was so loud that the first delivery had to be suspended - a quieter version appeared only a year later.



Sound locator in the US (1921). Since the US military monitored the airspace of its even less than a hundred years ago.



The first in the history of the current printer, made on the basis of the invention, mathematics Charles Babbage in 1834. This cumbersome mechanical computer model, which had the automatic printing and was called "difference engine". Fully assembled model was on the old drawings only after 150 years.



In 1905, German Karl-Ludwig Nessler demonstrated his invention - hardware perm. It looked like this: during a presentation device on the model's hair was long and twelve are wound pretty heavy brass rod connected to the electric machine is warming up. The whole procedure lasted about five hours.



Wardenclyffe Tower (1901-1917 years) - the first wireless telecommunication tower, designed by Nikola Tesla and is intended for commercial transatlantic telephone, radio and a demonstration of wireless power transmission. Interesting as an example, might look like towers of cellular operators a hundred years ago - imagine that those thousand!



Orthopedic simulators (1893), invented by the Swedish doctor Gustav Zander. Particularly popular among the aristocracy Stockholm.



.Uzhe Like a laptop in the open form, but quite unusual device in the folded - black box with small screens, more like a modern cash registers. The first laptops: Gavilan (1983) and Grid compass (1982).



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