This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 18 Excerpt: ... and a portion of this line will become the axis of the cone. From each of the points in the base of the cone draw perpendiculars passing through this horizontal, and make them the same length on each side as the lines drawn from the points in the semicircle to the diameter. Through these points trace by hand the ellipse ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 18 Excerpt: ... and a portion of this line will become the axis of the cone. From each of the points in the base of the cone draw perpendiculars passing through this horizontal, and make them the same length on each side as the lines drawn from the points in the semicircle to the diameter. Through these points trace by hand the ellipse, which represents the plan of the base, being the view from a point immediately over it. Drop a perpendicular from the apex of the elevation to cut the horizontal, and this intersection will be the plan of the apex. Join this by straight lines to the widest parts of the ellipse, and this will complete the projection. Fig. 4 is the projection of the cone when the base is at 30 to the horizontal, and its axis at 45 to the vertical plane. It has been shown in several previous figures that an object may be rotated without the height of any part of it being altered; and thus, as in the projection now required, the base of the cone is to be at an angle to the horizontal plane similar to that of the last figure, the plan will be the same in shape, but altered in position; therefore, repeat plan of Fig. 3, placing it so that the axis is at 45 to I L; then draw perpendiculars from all the points in the ellipse, and cut them by horizontals from the points in the elevation. Draw the projection of the base through the intersections. Draw a perpendicular from the point, which is the plan of the apex, and a horizontal from the apex in the elevation. The intersection of these will give the apex of the projection. Join this point to the ellipse representing the base, which will complete the figure. Of the Sections of Cones. If a cone be cut across, so that the plane of section may pass through the axis at an angle, and cut the slanting surface of the cone ...
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Seller's Description:
PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
Choose your shipping method in Checkout. Costs may vary based on destination.
Seller's Description:
PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
