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An illustration of a type of elevator composed of a small pulley used in this case to lift brick and mortar.

Brick and Mortar Elevator

An illustration of a type of elevator composed of a small pulley used in this case to lift brick and…

Illustration of half of an ellipse and its auxiliary circle used to construct an ellipse by points, having given its two axes.

Construction of an Ellipse

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 (2a).

Construction of an Ellipse

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 on both sides are formed of ashler laid in regular courses, and the inclosed space between them is filled in with rubble-work." -Whitney, 1911

Emplectum

"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." -Whitney, 1911

Excavator

"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."

Construction of an External Tangent to 2 Circles

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.

Construction of an 2 External Tangents to 2 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 the splashing of water or mud.

Vehicle Fender

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 conveniently be suspended from the ceiling-joists." -Whitney, 1911

Floor Hanger

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

A double floor showing bridging joists at a, binders at b, and ceiling joists at c.

Double Floor

A double floor showing bridging joists at a, binders at b, and ceiling joists at c.

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

Framed Floor

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

A single floor showing joists at a, a, a.

Single Floor

A single floor showing joists at a, a, a.

A strutted floor made from crossed struts to secure the floor joists.

Strutted Floor

A strutted floor made from crossed struts to secure the floor joists.

A Grooved and Tongued Joint is a joint used with boards in the same plane, so that the boards don't shrink and separate.

Grooved and Tongued Joint

A Grooved and Tongued Joint is a joint used with boards in the same plane, so that the boards don't…

"A beam only reaching partially across an opening." — Williams, 1889

Hammer-beam

"A beam only reaching partially across an opening." — Williams, 1889

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

Construction of Regular Heptagon in a Circle

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.

Hexagon Used to Construct Equivalent Triangle

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

Illustration of regular hexagon and triangle inscribed in circle.

Hexagon Inscribed in Circle by Construction

Illustration of regular hexagon and triangle inscribed in circle.

Construction of a regular hexagonal pyramid.

Construction of Hexagonal Pyramid

Construction of a regular hexagonal pyramid.

Pattern that can be cut out and folded to construct a regular hexahedron. Fold on the dotted lines, and keep the edges in contact by the glued strips of paper.

Pattern for Hexahedron

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 under General Sherman, 1861-2. Our illustration of the Government buildings erected on Hilton Head, S. C., embrace the following points of interest: Commissary's Quarters, built by the Confederates; Post Sutler's, built by the Confederates; Camp of the Eighth Main Regiment; butcher's yard; Camp of the Third New Hampshire regiment; Camp of the Forty-eighth New York regiment; Camp of the Forty-seventh New York regiment; Provost Marshal Major Beard's quarters and Provost Marshal's guard; General Viele's headquarter's; General Sherman's headquarters; Captain Pothouse's (Assistant Adjutant-general) headquarters; lodging house, built by the Confederates; bakery; unfinished building; Captain Saxton's office, and other Government offices, formerly Generals Drayton and Wright's headquarters." —Leslie, 1896

Hilton Head

"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 under General Sherman, 1861-2. Our illustration of the Government buildings erected on Hilton Head, S. C., embrace the following points of interest: Signal Station for telegraphing to beaufort, Bay Point, etc; post office, formerly old confederate barn; Captan Hascell's office and storehouses; old Confederate building; storehouse for ammunition; unfinished dwelling; boxes filled with shot and shell; heavy shot; temporary wharf; siege gun-carriages; building permanent wharf; heavy columbiads; armories department, and part of the stone fleet. This sketch cannot fail to be generally interesting, more especially to those who had friends or relatives in this expedition, or participated in it themselves. The buildings were unpleasantly significant to the secessionists that the Federal troops had come to stay." —Leslie, 1896

Hilton Head

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

The hook or joint on wich a door, gate, or lid, etc., turns.

Hinge

The hook or joint on wich a door, gate, or lid, etc., turns.

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

Development of Hollow Rectangular Prism

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

This is the house that Jack built.

House that Jack Built

This is the house that Jack built.

the term light hull is used to describe the outer hull of a submarine, which houses the pressure hull, providing hydro dynamically efficient shape

Submarine Hull

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.

Hyperbola Conjugate Diameters

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 constant difference 2a.

Construction of Hyperbola

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 (2a).

Construction of a Hyperbola

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.

I-Beam Girder

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, and keep the edges in contact by the glued strips of paper.

Pattern for Icosahedron

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

Development of an isometric of a cube.

Development of an Isometric of a Cube

Development of an isometric of a cube.

Illustration of the construction used to create an isosceles triangle, given the bases and the sum of the altitude and a side.

Construction Of An Isosceles Triangle

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

A wooden frame on which wood or timber is sawed.

Jack

A wooden frame on which wood or timber is sawed.

"The upright centre beam of a compound girder." — Williams, 1889

King-post

"The upright centre beam of a compound girder." — Williams, 1889

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

Level

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 two given points.

Levelling

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.

Light Inverted Bow-String Girder (Elevation and Section)

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 of theta, starting from oc. The values of r can be calculated and then the curve can be plotted.

Construction of Logarithmic Spiral

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

Changing the ground level to a smooth horizontal or gently sloping surface.

Grading Machine

Changing the ground level to a smooth horizontal or gently sloping surface.

"The construction for the image produced by a plane mirror depends upon the fact that the image of the object may be located by locating the images of a number of well chosen points in the surface of the object." -Avery 1895

Object in Plane Mirror

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

Octagon constructed from a square.

Construction of Octagon From Square

Octagon constructed from a square.

Pattern that can be cut out and folded to construct a regular octahedron. Fold on the dotted lines, and keep the edges in contact by the glued strips of paper.

Pattern for Octahedron

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 (m).

Construction of a Parabola

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.

Construction Of A Parallel Line

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.

Parallelogram Used to Construct Equivalent Square

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.

Pentagon Constructed to be Similar to Given Pentagons

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 lines shown.

Pentagon Inscribed in Circle by Construction

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.

Construction Of A Perpendicular Bisector Of A Straight Line

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.

Construction Of A Perpendicular To 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 not on the line.

Construction Of A Perpendicular To A Straight Line

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

Section view of wharves at Deptford and Blackwall, England. An example of pile work, which is work consisting of piles and is often found in construction. d, iron land ties; a, pile.

Pile Work

Section view of wharves at Deptford and Blackwall, England. An example of pile work, which is work consisting…

A style of joint employed in the art of Joinery (the making and fitting of the interior wood-work of a building).

Ploughed and Tongued Joint

A style of joint employed in the art of Joinery (the making and fitting of the interior wood-work of…

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

Riveted Steel Plate Girder

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, its period being from the conversion of England to Christianity till the conquest or near it, when Norman architecture began to prevail.

Church Saxon Architecture

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 with a steam-shovel or operated by power by means of chains that drag the bucket over or through loose material, causing it to scoop up a load." -Whitney, 1911

Shovel Bucket

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

This illustration shows a simple lattice girder.

Simple Lattice Girder (Elevator and Elevation)

This illustration shows a simple lattice girder.

"In architecture, a stone built into the base of a gable to support the skews or coping above, and resist their tendency to slide down from their bed. Also called summer-stone, skew-put, and skew." —Whitney, 1889

Skew Corbels

"In architecture, a stone built into the base of a gable to support the skews or coping above, and resist…

An incomplete skyscraper, with steel framework visible.

Incomplete skyscraper

An incomplete skyscraper, with steel framework visible.

"A slide-rest such as would be used with the lathe in the previous engraving, for which purpose simplicity of construction and steadiness in all its parts are the points chiefly aimed at." —The Encyclopedia Britannica, 1910

Slide-Rest

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