Illustration of half of an ellipse and its auxiliary circle used to construct an ellipse by points,…

Diagram showing how to construct an ellipse when given the two foci and the length of the major axis…

"That kind of masonry, much used in ancient fortification-walls, etc. in which the outside surfaces…

"A horse- or steam-power machine for digging, moving, or transporting loose gravel, sand, or soil."…

Illustration used to show how "to construct a common external tangent to two given circles."

Illustration used to show how to construct two common external tangents to two given circles.

A guard over each wheel of a motor vehicle, for example, that is shaped and positioned so as to block…

"A shaft-bearing secured to the floor, and used for running countershafts and lines when they cannot…

A framed floor showing floor-joists at a, binding-joist at b, ceiling joists at c, and girder at d.

Illustration of beginning of construction of a regular heptagon in a circle.

Illustration of a how to construct a triangle equivalent to a given hexagon/polygon.

Illustration of regular hexagon and triangle inscribed in circle.

Pattern that can be cut out and folded to construct a regular hexahedron. Fold on the dotted lines,…

"Expedition to Port Royal- Government buildings erected on Hilton Head, S. C., by the Federal forces…

"Expedition to Port Royal- Government buildings erected on Hilton Head, S. C., by the Federal forces…

Pattern that can be used to make a hollow rectangular prism. Development of hollow rectangular prism.

the term light hull is used to describe the outer hull of a submarine, which houses the pressure hull,…

Any two conjugate diameters of an hyperbola are harmonic conjugates with regard to the asymptotes.

Illustration showing how a hyperbola con be constructed by points, having been given the foci and the…

Diagram showing how to construct a hyperbola when given the two foci and the length of the major axis…

An I-Beam girder is a load bearing beam of steel or iron. It is shaped like a capital letter I.

Pattern that can be cut out and folded to construct a regular icosahedron. Fold on the dotted lines,…

Illustration of the construction used to create an isosceles triangle, given the bases and the sum of…

An instrument by which to find a horizontal line, or adjust something with reference to such a line.

Leveling is an operation in which the object is to determine to difference of vertical height between…

This illustration shows a light inverted bow-string girder, as well as a section.

Illustration showing how a rolling logarithmic spiral can be constructed by taking successive values…

"The construction for the image produced by a plane mirror depends upon the fact that the image of the…

Pattern that can be cut out and folded to construct a regular octahedron. Fold on the dotted lines,…

Diagram showing how to construct a parabola when given the directrix (d), the focus (F) and the eccentricity…

Illustration of the construction used to create a line parallel to a given line.

Illustration of a how to construct a square equivalent to a given parallelogram.

Illustration of a how to construct a pentagon similar to two given pentagons.

Illustration of pentagon inscribed in circle. Or, circle circumscribed about pentagon. Construction…

Illustration of the construction used to make a perpendicular bisector of a straight line.

Illustration of the construction used to create a perpendicular to a straight line at a given point.

Illustration of the construction used to create a perpendicular to a straight line from a given point…

A riveted steel plate girder is designed to bear a large load in a building or bridge, and is made of…

Tower of Sompting church, Essex. Saxon Architecture is the earliest stage of native English architecture,…

"In railroad construction and canal- or road-work, a large scooping bucket armed with teeth and used…

"A slide-rest such as would be used with the lathe in the previous engraving, for which purpose simplicity…

Illustration of a how to construct a square equivalent to the sum of two given squares.

Illustration of a how to construct a square equivalent to the difference of two given squares.

Illustration used to show how "to construct a tangent to a circle from a point outside."

Pattern that can be cut out and folded to construct a regular tetrahedron. Fold on the dotted lines,…