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"Fig. 1, Monads; 2, Forms assumed by the Ameoba; 3, Flask Animalcules, Enchelis; 4, Actinophrys sol; 5, Euglena viridis ; 6, Gonium pectorale; 7, Trachelias anas ; 8, Paramecium aurelia ; 9, Navicula; 10, Vibrie Spirillum; 11, Vorticella Stentor" — Goodrich, 1859

Forms of the animalcules, magnified

"Fig. 1, Monads; 2, Forms assumed by the Ameoba; 3, Flask Animalcules, Enchelis; 4, Actinophrys sol;…

"The connective tissue with white fibers sometimes forms a very thin sheet, as in the delicate covering of a bone known as the periosteum, or it may be made up into ropelike bands, as in the ligaments of joints and the tendons of muscles." — Blaisedell, 1904

White fibrous tissue

"The connective tissue with white fibers sometimes forms a very thin sheet, as in the delicate covering…

"Aphaniptera includes the fleas, which, despite their minuteness, have made themselves a name in the world. The arterial covering is a horny compound of very distinct segmentsl the wings are four, but nearly rudimentary; the suctional organs consist of a pair of fine, serrated, sword-shaped mandibles, provided with a sharp, needle-like spear for penetrating the skin of the victim." — Goodrich, 1859

Flea

"Aphaniptera includes the fleas, which, despite their minuteness, have made themselves a name in the…

A magnifying glass.

Magnifying Glass

A magnifying glass.

"A microscope consists of a lens or a combination of lenses used to observe small objects, often so minute as to be invisible to the unaided eye." — Avery, 1895

Microscope

"A microscope consists of a lens or a combination of lenses used to observe small objects, often so…

"A Compound Microscope. The appearance of the various structures and tissues of the human body as revealed by the microscope possesses a curious fascination for every observer, especially for young students. No one ever forgets the first look at a drop of blood, or the circulation of blood in the web of a frog's foot as revealed by the microscope." — Blaisedell, 1904

Compound microscope

"A Compound Microscope. The appearance of the various structures and tissues of the human body as revealed…

"Their bodies consist either of aa simple elementary cell, with its contents, or of an aggregation of several of these cells; each, however, still appearing to retain its independent existence. They are generally of a very minute size, and only to be observed with the microscope." — Goodrich, 1859

Protozoans

"Their bodies consist either of aa simple elementary cell, with its contents, or of an aggregation of…

"A telescope is an instrument designed for the observation of distant objects, and consists essentially of an objective for the formation of an image of the object and of an eyepiece for magnifying this image." — Avery, 1895

Telescope

"A telescope is an instrument designed for the observation of distant objects, and consists essentially…