Calendar: 1860-1861 Page 126

APPLIED SCIENCES 127 The Engineer and Mechanist make separate drawings showing the resolution of Machinery into the fixed and moving parts illustrating by examples from- Planing Machines Lathes Drilling-machines Slotting- Machines Nut and Screw-cutting Presses &c showing the conversion of- Continuous and alternate circular motion into con- tinuous and alternate with change of velocity and direction of motion β Alternating rectilinear into alternating circular or rectilinear and the converse In parallel motions gearing drums screws &c Problems in Solid Geometry relating to curved surfaces Expression of Surfaces by generators Tangent and Normal planes to surfaces and lines of double curvature Intersections of Surfaces Development of Surfaces Applied to the representation of- Screws triangular and square-threaded β Solids of Revolution γ Ruled Surfaces Construction of Oblique or Skew Bridges -Groined Arches Vaults and apertures in them and development of the forms of the stones required in their construction Coupe de Pierre Practice in the determination of the outlines of shadows cast by bodies with curved surfaces on plane and curved surfaces and the expression of them in Indian ink Isometric Projection applied to the representation of such works as are capable of being advantageously shown on that principle such as- Locks framing rests and other parts of machines or buildings generally rectangular in form