Skew Arches: Advantages and Disadvantages of Different Methods of Construction |
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a₁ abscissa angle axis b₁ Brevet C₁ cj c's cj s's cjs's cloth common logarithm construction cosē cosec coursing joint cow's horn surface curve cut curves Q direction of pressure draw drawn element ellipses elliptical directrices engravings equation equation 39 H j c's helicoidal method helix hence horizontal plane horizontal projections hyperbolic paraboloid Hypsometry Illustrated intersection locus maximum normal NOSTRAND'S PUBLICATIONS obliquity P₁ perpendicular piercing the soffit plane parallel plates point of piercing points of division Practical r₁ revised and enlarged right line sinē SKEW ARCHES springing plane Steam Engine stone Substituting tangent line Telegraphy templet tendency to slide tion Treatise U. S. Navy vertical plane vertical projections voussoir warped surface whence wood cuts x₁ Y₁ πρ