Treatise on
章节目录
共 28 段- (8.) _Force._--If the particles of matter were endued with n
- Larger mineral masses exhibit degrees of porosity not less s
- (43.) We are not, however, without direct experience to prov
- Hence it appears that the quantity of motion in the directio
- (83.) Any number of forces acting on the same point of a bod
- These observations respecting the true import of the term “a
- The earth is known to be a globular mass of matter, incompar
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- C = (_c_ × W × R)/T^2.
- The centre of gravity of a triangle being thus determined, w
- (174.) Although the centre of gravity takes its name from th
- Let C D, _fig. 72._, be a section of the body made by a plan
- The first and most striking of these circumstances is the le
- (224.) In expressing the effect of machinery it is usual to
- (244.) In the rectangular lever the arms are perpendicular t
- (259.) The most usual method of transmitting motion through
- (267.) The next class of simple machines, which present them
- Let A B, _fig. 130._, be such a plane, B C its
- Thus, suppose the screw A has twenty threads in an inch, whi
- (306.) In the same machine there occurs a singularly happy e
- (313.) The classes of simple machines denominated mechanic p
- When the steam-engine is used for certain purposes, such as
- (327.) Contrivances for diminishing the effects of friction
- If the beam be sufficiently loaded, the centre of gravity wi
- The writer of this article has used a balance of this kind,
- The first instrument of this kind appears to have been inven
- _Fig. 217._ is a side view of the pendulum rod when together
- “The rod S F is made of steel, and perfectly straight; its f