A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . so the changed relations with power applied at differentpoints, may be found in an examination of other examples which refer to the rela-tion of the three factors of levers. Levers of the First Kind.—The beam of balance scales is a lever of the first kind. The support or central stand- Fir ^fi ard is the fulcrum, with points ofpower and weight at the end attach-ments for the pans. See Fig. can now be seen at once that whenthe beam or lever is at equilibriumthe fulcrum sust
A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . so the changed relations with power applied at differentpoints, may be found in an examination of other examples which refer to the rela-tion of the three factors of levers. Levers of the First Kind.—The beam of balance scales is a lever of the first kind. The support or central stand- Fir ^fi ard is the fulcrum, with points ofpower and weight at the end attach-ments for the pans. See Fig. can now be seen at once that whenthe beam or lever is at equilibriumthe fulcrum sustains the sum ofpower and weight, and this wouldhold true of any lever of the first kindat whatever intermediate point be-tween power and weight the fulcrumis placed. Therefore, when the fiil-crum is exactly in the middle of thelever of the first kind, at equilibrium, *In mathematical exactness, a post moved in this way, with its imbedded portion completely surrounded witha homogeneous resisting medium, the depth of the upper V-shaped opening would be somewhat less than two-thirds the entire depth of the 100 PART IV. TECH NIC PRINCIPLES OF PRACTICE Fig. 37. w 15
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Keywords: ., bookcentury1900, bookdecade1920, bookidpracticaltre, bookyear1921
