-
100
introduced
the water screw was introduced by archimedes -
Period: 100 to
use
the time the water screw has beem used -
150
explianing
For since it [the delta of the Nile River] is alluvial soil and well watered, it produces many crops of every kind, inasmuch as the river by its annual rise regularly deposits on it fresh slime, and the inhabitants easily irrigate its whole area by means of a contrivance which was invented by Archimedes of Syracuse and is called, after its shape, a screw -
150
explaning contineud
and what is the most surprising thing of all, they [Roman slaves] draw out the water of the streams they encounter [in Spanish mines] by means of what is called by men the Egyptian screw, which was invented by Archimedes of Syracuse at the time of his visit to Egypt; and by the use of such screws they carry the water in successive lifts as far as the entrance, drying up in this way the spot where they are digging and making it well suited to the furtherance of their operations. -
200
uses
The bilge-water [of the ship Syracusia], even when it became very deep, could easily be pumped out by one man with the aid of the screw, an invention of Archimedes -
May 2, 600
contineud
Since this machine is an exceptionally ingenious device, an enormous amount of water is thrown out, to one's astonishment, by means of a trifling amount of labour, and all the water from such rivers is brought up easily and from the depths and poured out on the surface. And a man may well marvel at the inventiveness of the craftsman [Archimedes], in connection not only with this invention but with many other greater ones as well the fame of which has encompassed the entire inhabited world. -
Period: to
used for
the archimedes screw is now mainly used as art or amusement like at the west edmonton mall water park -
parts of
circular pipe enclosing a helix and inclined at an angle of about 45 degrees to the horizontal with its lower end dipped in the water -
how its made 1 part 1
There is also the method of the screw, which raises a great quantity of water, but does not carry it as high as does the wheel. The method of constructing it is as follows. A beam is selected, the thickness of which in digits is equivalent to its length in feet [16 digits = 1 foot]. This is made perfectly round. The ends are to be divided off on their circumference with the compass into eight parts, -
how its made 1 part 2
by quadrants and octants, and let the lines be so placed that, if the beam is laid in a horizontal position, the lines on the two ends may perfectly correspond with each other, and intervals of the size of one eighth part of the circumference of the beam may be laid off on the length of it. Then, placing the beam in a horizontal position, let perfectly straight lines be drawn from one end to the other. -
how its made 1 part 3
So the intervals will be equal in the directions both of the periphery and of the length. Where the lines are drawn along the length, the cutting circles will make intersections, and definite points at the intersections.