"The compound ascidians, or <em>Botryllidae</em>, are united togetyher by the coalescence of of their mantles, so as to form a leathery or gelatinous mass, ususally attached to stones or sea-weed; in this the seperate animals are imbedded round a common canal, many of them being adorned with beautiful colors, and these masses are of an almost infinte variety of forms." &mdash; Goodrich, 1859

Compound ascidians

"The compound ascidians, or Botryllidae, are united togetyher by the coalescence of of their…

"The compound ascidians, or <em>Botryllidae</em>, are united togetyher by the coalescence of of their mantles, so as to form a leathery or gelatinous mass, ususally attached to stones or sea-weed; in this the seperate animals are imbedded round a common canal, many of them being adorned with beautiful colors, and these masses are of an almost infinte variety of forms." &mdash; Goodrich, 1859

Compound Ascidians

"The compound ascidians, or Botryllidae, are united togetyher by the coalescence of of their…

"The eyes, which are among the most wonderful objects in nature, are almost always of the kind called <em>compound</em>, that is to say, they consist of a multitude of little hexagonal facets, brought close together on each side of the head, each furnished with a cornea, a lens, a coating of pigment, and a nervous filament, and being in fact a true eye." &mdash; Goodrich, 1859

Eyes of a Bee

"The eyes, which are among the most wonderful objects in nature, are almost always of the kind called…

"Find the center of gravity of two of the bodies, as W1, and W4, in fig 4. Assume that the weight of both bodies is concentrated at C1, and find the center of gravity of this combined weight at C1, and the weight of W2; let it be at C2; then find the center of gravity of the combined weights of W1, W4, W2 (concentrated at C2), and W2; let it be at C; then C will be the center of gravity of the four bodies." &mdash;Hallock 1905

Compound Center of Gravity

"Find the center of gravity of two of the bodies, as W1, and W4, in fig 4. Assume that the weight of…

"When several simple levers are connected together, and act one upon the other, the machine is called a compound lever." -Comstock 1850

Compound Lever

"When several simple levers are connected together, and act one upon the other, the machine is called…

"In compound levers, equilibrium is established when the power, multiplied by the first arms of all the levers, is equal to the weight multiplied by the last arms of all the levers." &mdash;Quackenbos 1859

Compound Lever

"In compound levers, equilibrium is established when the power, multiplied by the first arms of all…

"Nachet's Combined Simple and Compound Microscope." &mdash;The Encyclopedia Britannica, 1903

Compound Microscope

"Nachet's Combined Simple and Compound Microscope." —The Encyclopedia Britannica, 1903

"Ross's Jackson-Zentmayer Compound Microscope." &mdash;The Encyclopedia Britannica, 1903

Compound Microscope

"Ross's Jackson-Zentmayer Compound Microscope." —The Encyclopedia Britannica, 1903

"Compound motion is that which is produced by two or more forces, acting in different directions, on the same body, at the same time." -Comstock 1850

Compound Motion

"Compound motion is that which is produced by two or more forces, acting in different directions, on…

"If the number of ropes be increased, the weight may be increased with the same power; or the power may be diminished in proportion as the number of ropes is incrased." -Comstock 1850

Compound Pulley

"If the number of ropes be increased, the weight may be increased with the same power; or the power…

"...there is a system of pulleys represented, in which the weight is sixteen times the power." -Comstock 1850

Compound Pulley

"...there is a system of pulleys represented, in which the weight is sixteen times the power." -Comstock…

"Compound pulleys using one fixed and two moveable pulleys to pull a weight up by applying a downward force." -Avery 1895

Compound Pulley

"Compound pulleys using one fixed and two moveable pulleys to pull a weight up by applying a downward…

"Compound pulley designed to use very little power to lift heavy weights." -Avery 1895

Compound Pulley

"Compound pulley designed to use very little power to lift heavy weights." -Avery 1895

"Compound wound dynamo, used when better automatic regulation of voltage on constant pressure circuits is desired than is possible with the shunt machine." &mdash; Hawkins, 1917

Compound wound dynamo

"Compound wound dynamo, used when better automatic regulation of voltage on constant pressure circuits…

"The series and shunt methods of winding [a dynamo] may be combined in the same machine, producing what is called a compound wound dynamo." -Atkinson 1903

Compound Wound Dynamo

"The series and shunt methods of winding [a dynamo] may be combined in the same machine, producing what…

"The upright centre beam of a compound girder." &mdash; Williams, 1889

King-post

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

"Sometimes it is not convienent to use a lever sufficiently long to make a given power support a given weight. A combination of levers, called a compound lever, may then be used." -Avery 1895

Compound Lever

"Sometimes it is not convienent to use a lever sufficiently long to make a given power support a given…

"This consists of two convex lenses, by one of which the image is formed within the tube of the instrument, and by the other this image is magnified as seen by the eye; so that by this instrument the object itself is not seen, as with the single microscope, bu we see only its magnified image." -Comstock 1850

Compound Microscope

"This consists of two convex lenses, by one of which the image is formed within the tube of the instrument,…

"Nachet's Portable Compound Microscope." &mdash;The Encyclopedia Britannica, 1903

Portable Microscope

"Nachet's Portable Compound Microscope." —The Encyclopedia Britannica, 1903

"Nachet's Portable Compound and Dissecting Microscope, as packed in case." &mdash;The Encyclopedia Britannica, 1903

Portable Microscope

"Nachet's Portable Compound and Dissecting Microscope, as packed in case." —The Encyclopedia Britannica,…

"Many wheels may be combined together, and in many ways, to form compound pulleys. Whenever there is but one rope running through the whole, as shown here, the relation of power and resistance is known by the number of folds, or turns, of the rope which supports the weight." &mdash; Goodrich, 1844

Compound pulley

"Many wheels may be combined together, and in many ways, to form compound pulleys. Whenever there is…

"In order that the successive wheels should revolve in the same time, and their circumfrences should be just equal to the length of rope passing between them...By this construction, although the length of rope passing over each was different, yet their revolutions are equal, both with respect to time and number." -Comstock 1850

White's Pulley

"In order that the successive wheels should revolve in the same time, and their circumfrences should…