 | Mrs. Marcet (Jane Haldimand), Thomas P. Jones - 1826 - 286 страници
...perceived through a good magnifying glass. When, therefore, the surfaces of the two bodies come in contact, the prominent parts of the one, will often...proportion as the surfaces of bodies are well polished, sthe friction is doubtless diminished; but it is always considerable, and it is usually computed to... | |
 | Levi Washburn Leonard - 1827 - 398 страници
...magnifyingglass their inequalities may frequently be perceived. When the surfaces of two bodies, therefore, come into contact, the prominent parts of the one...other, and occasion more or less resistance to motion. Friction is usually computed to destroy one third of the power of the machine. The application of oil... | |
 | Levi Washburn Leonard - 1830 - 350 страници
...magnifyingglass their inequalities may frequently be perceived. When the surfaces of two bodies, therefore, come into contact, the prominent parts of the one...other, and occasion more or less resistance to motion. Friction is usually computed to destroy one third of the power of the machine. The application of oil... | |
 | 1832 - 650 страници
...be made relative to them, which is, that friction in a considerable degree diminishes their force. Friction is the resistance which bodies meet with...other, and occasion more or less resistance to motion. In proportion as the surfaces of bodies are well polished, the friction is diminished; but it is always... | |
 | 1832 - 642 страници
...be made relative to them, which is, that friction in a considerable degree diminishes their force. Friction is the resistance which bodies meet with...the prominent parts of the one will often fall into (he hollow parts of the other, and occasion more or less resistance to motion. In proportion as the... | |
 | Ireland commissioners of nat. educ - 1835 - 398 страници
...inequalities may frequently be perceived through a good magnifying glass. When, therefore, the surfaces of two bodies come into contact, the prominent parts...other, and occasion more or less resistance to motion. In proportion as the surfaces of bodies are well polished, the friction is diminished ; but it is always... | |
 | 1836 - 424 страници
...inequalities may frequently be perceived through a good magnifying glass. When, therefore, the surfaces of two bodies come into contact, the prominent parts...other, and occasion more or less resistance to motion. In proportion as the surfaces of bodies are well polished, the friction is diminished ; but it is always... | |
 | Richard Green Parker - 1838 - 266 страници
...inequalities in their surfaces, which may be perceived by a microscope. When, therefore, the surfaces of two bodies come into contact, the prominent parts...often fall into the hollow parts of the other, and cause more or less resistance to motion. 263. Of what are all maohines, instruments, implements, &c.,... | |
 | Jane Marcet - 1839 - 544 страници
...inequalities may frequently be perceived through a good magnifying glass. When, 'therefore, the surfaces of two bodies come into contact, the prominent parts...less resistance to motion. CAROLINE. But if a machine be made of polished metal, as a watch, for instance, the friction must be very trifling. MRS. B. In... | |
 | Richard Green Parker - 1839 - 262 страници
...inequalities in their surf-ices, which may be perceived by a microscope. When, therefore, the surfaces of two bodies come into contact, the prominent parts of the one will often fill into the hollow parts of the other, and cause more or less resistance 263. Of what are all machines,... | |
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When, therefore, the surfaces of the two bodies come into contact, the prominent parts of the one will often fall into the hollow parts of the other, and occasion more or less resistance to motion. In proportion as the surfaces of bodies are well polished,... 
