 | Benjamin Martin - 1747 - 398 стор.
...commonly call'd MECHANICAL POWERS or MACHINES : They are Six in Number, as follow, viz. The Lever, the Pulley, the Wheel and Axle, the Inclined Plane, the Wedge, and the Screw. They are call'd Mechanical Powers, becaufe they increafe our Power of moving or raifing heavy Bodies,... | |
 | George Gregory - 1798 - 630 стор.
...machines or powers, of which all the more complex engines are conftrufted ; and thefe are the lever, the pulley , the wheel and axle, the inclined plane, the wedge, and the Jcrew. It has been remarked by fome authors, that thefe fix machines may in fact be refolved into two,... | |
 | James Smith - 1815 - 684 стор.
...consist, are called, by way of distinction, the Mechanical Powers. They are six in number, viz. the LEVER, the PULLEY, the WHEEL AND AXLE, the INCLINED PLANE, the WEDGE, and the SCREW. Some authors arc of opinion that we ought only to reckon two simple machines, the lerer and the inclined... | |
 | Mrs. Marcet (Jane Haldimand) - 1821 - 350 стор.
...they are six in number, one or more of which enters into the composition of every machine. The lever, the pulley,, the wheel and axle, the inclined plane, the wedge, and the screw. In order to understand the power of a machine, there are four things to be considered. 1st. The power... | |
 | John Griscom - 1823 - 84 стор.
...during half an hour or an hour, boys may become acquainted with the nature and properties of the lever, the pulley, the wheel and axle, the inclined plane, the wedge and the screw ; and it cannot but surprise and delight them to learn that the multiform operations of machinery, however... | |
 | Mrs. Marcet (Jane Haldimand), Thomas P. Jones - 1826 - 286 стор.
...WEIGHT. MRS. B. WE may now proceed to examine the mechanical powers ; they are six in number : The lever, the pulley, the wheel and axle, the inclined plane, the wedge and the serez«;\one or more of which enters into the composition of every machine. A mechanical power is an... | |
 | Levi Washburn Leonard - 1827 - 398 стор.
...resistances as his natural strength could never effect without them. They are six in number, the lever, the pulley, the wheel and axle, the inclined plane, the wedge, and the screw, one or more of which enters into the composition of every machine. In order to understand the power... | |
 | New-York Institution for the Instruction of the Deaf and Dumb - 1828 - 518 стор.
...are indebted to England ; its utility will point the inventor out as a benefactor of the human race. By the same. THE MECHANICAL POWERS. These powers are...accomplish several kinds of labor. The names of the thiee to which the six mechanical powers are reduced, are, first, the lever, including the lever and... | |
 | Levi Washburn Leonard - 1830 - 350 стор.
...resistances as his natural strength could never effect without them. They are six in number, the lever, the pulley, the wheel and axle, the inclined plane, the wedge, and the screw, one or more of which enters into the composition of every machine. In order to understand the power... | |
 | 1832 - 640 стор.
...They are six in number, one or more of which enters into the composition of every machine. The lever, the pulley, the wheel and axle, the inclined plane, the wedge, and the screw. In order to understand the power of a machine, there are four things to be considered. 1st. The power... | |
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The lever, the pulley, the wheel, and axle, the inclined plane, the wedge, and the screw. 
