ClipArt ETC
"In a body of equal thickness, as a board, or a slab of marble, but otherwise of an irregular shape, the centre of gravity may be found by suspending it, first from one point, and then from another, and marking, by means of a plumb line, the perpendicular ranges from the point of suspension. the centre of gravity will be the point where these two lines cross each other." -Comstock 1850

Center of Gravity

"In a body of equal thickness, as a board, or a slab of marble, but otherwise of an irregular shape,…

"Where five blocks are placed in this position, the point of gravity is near the centre of the thrd block, and is within the base as shown by the plumb line. But on adding another block, the gravitation point falls beyond the base, and the whole will now fall by its own weight." -Comstock 1850

Center of Gravity of Standing Blocks

"Where five blocks are placed in this position, the point of gravity is near the centre of the thrd…

"A load of hay...upsets where one wheel rises by little above the other, because it is broader on the top than the distance of the wheels from each other; while a load of stone is very rarely turned over..." -Comstock 1850

Center of Gravity of a Load of Hay

"A load of hay...upsets where one wheel rises by little above the other, because it is broader on the…

"When a ball is rolling on a horizontal plane, the centre of gravity is not raised, but moves in a straight line, parallel to the surface of the plane on which it rolls, and is consequently always directly over its centre of gravity." -Comstock 1850

Center of Gravity of a Rolling Ball

"When a ball is rolling on a horizontal plane, the centre of gravity is not raised, but moves in a straight…

"FESS POINT. The exact centre of the escutcheon, as seen in the annexed example." -Hall, 1862

Fess Point

"FESS POINT. The exact centre of the escutcheon, as seen in the annexed example." -Hall, 1862

"HONOUR POINT. That part of the shield between the precise middle chief and the fess point. In the annexed example the large dot in the centre shows the fess point; the point within the letter D, the honour point." -Hall, 1862

Honour Point

"HONOUR POINT. That part of the shield between the precise middle chief and the fess point. In the annexed…

The central part of a car wheel (or fan or propeller etc) through which the shaft or axle passes

Wheel Hub

The central part of a car wheel (or fan or propeller etc) through which the shaft or axle passes

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

King-post

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

"Argent, a mullet pierced, sable, on a chief azure, three mullets pierced, of the first. PIERCED OR PERFORATED. Cut through the centre." -Hall, 1862

Mulllet Pierced

"Argent, a mullet pierced, sable, on a chief azure, three mullets pierced, of the first. PIERCED OR…

"A number of rings arranged round a centre, so as to represent a sphere; used to illustrate the relative positions of the ecliptic, equator, etc., of the celestial sphere." — Williams, 1889

Armillary sphere

"A number of rings arranged round a centre, so as to represent a sphere; used to illustrate the relative…

"A loaded vehicle is represented as crossing the side of a hill, which has been raised one wheel above the level of the other wheel, so as to incline the body of the vehicle very considerably from the horizontal. The centre of gravity is represented in two different positions; a lower one with th eline of direction L C, and a higher one with the line of direction U C. If there had been no load upon the vehicle, the line of direction would have remained at L C; and as it falls within the wheel, or base, the vehicle would have maintained its balance. But if the wagon had been laden, the centre of gravity would have been raised, and, the line of direction U C consequently falling without the wheel, the vehicle must overturn." — Goodrich, 1844

Vehicle on hill

"A loaded vehicle is represented as crossing the side of a hill, which has been raised one wheel above…