Edmund Ruffin (January 5, 1794 – June 18, 1865) was a farmer and slaveholder, a Confederate soldier,…
A, crepidoma or stylobate; B, column; C, architrave; D, tænia; E, frieze; F, horizontal cornice;…
The Ionic order column originated in the mid-6th century BC in Ionia. The Ionic order column was being…
The Ionic order column originated in the mid-6th century BC in Ionia. The Ionic order column was being…
The Corinthian order is one of the Classical orders of Greek and Roman architecture, characterized by…
The Ionic order column originated in the mid-6th century BC in Ionia. The Ionic order column was being…
An illustration of a small jellyfish. Jellyfish are free-swimming members of the phylum Cnidaria. ellyfish…
An illustration depicting an astigmatism. An optical system with astigmatism is one where rays that…
Troy weight is a system of units of mass customarily used for precious metals, black powder, and gemstones.
Antonio López de Santa Anna (February 21, 1794 – June 21, 1876), often known as Santa Anna, was a…
Hundred weight or hundredweight is a unit of measurement for mass in U.S. customary units and was historically…
"Zircon, a mineral composed of of zirconium silicate, sometimes used as a gem-stone... THe mineral crystallizes…
"Zircon, a mineral composed of of zirconium silicate, sometimes used as a gem-stone... THe mineral crystallizes…
Constructive system of a Gothic church illustrating the principles of isolated supports and buttressing.
An illustration of a mechanical kettledrum showing the system of cords inside. Timpani (also known colloquially…
The digestive apparatus of the horse. Labels: a, mouth; 2, pharynx; 3, esophagus; 4, diaphragm; 5, spleen;…
The relation of anterior abdominal digestive organs- left antero-lateral view. Labels: 1, liver; 2,…
An illustration of an Albert model clarinet. The Albert system refers to a system of clarinet keywork…
An illustration of an Boehm model clarinet. The Böhm system for the clarinet is a system of clarinet…
An illustration of a chiton's excretory and reproductive organs. O, Ovary; P, Pericardium; N, Nephridium;…
An illustration of a chiton's excretory and reproductive organs. O, Ovary; P, Pericardium; N, Nephridium;…
An illustration of a chiton's excretory and reproductive organs. O, Ovary; P, Pericardium; N, Nephridium;…
An illustration of a chiton's excretory and reproductive organs. O, Ovary; P, Pericardium; N, Nephridium;…
General view of the respiratory organs. Labels: a, septum nasi; b, posterior naris; c, larynx; d, trachea;…
The nervous system of the horse. Labels: 1, brain; 2, optic nerve; 3, superior maxillary nerve (5th);…
The cornet is a brass instrument very similar to the trumpet, distinguished by its conical bore, compact…
The cornet is a brass instrument very similar to the trumpet, distinguished by its conical bore, compact…
"inverted Vertical Pendulum Seismograph. Marvin System. A stiff vertical tube, pivoted at its bottom…
An illustration of the young stages of Noctiluca scintillans. Noctiluca scintillans, also published…
An illustration of the young stages of Noctiluca scintillans. Noctiluca scintillans, also published…
An illustration of the first stage of fission in the Noctiluca scintillans. Noctiluca scintillans, also…
An illustration of the second stage of fission in the Noctiluca scintillans. Noctiluca scintillans,…
An illustration of the aboral side view of the Noctiluca scintillans. Noctiluca scintillans, also published…
An illustration of the Noctiluca scintillans. Noctiluca scintillans, also published as Noctiluca miliaris,…
An illustration of the lateral view of the Noctiluca scintillans. Noctiluca scintillans, also published…
"Human Thoracic Duct and Azygous Veins. a, receptacle of the chyle; b, trunk of the thoracic duct, opening…
An illustration of the reproductive system of a female earthworm which is located in the eleventh to…
An enlargement of the reproductive organs of a earthworm. "sp, Spermatheca; sp',Spermathecal sac involving…