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"Amaeba proteus; B, Amaeba radiosa. n, nucleus. c, contractile vacuole. a, food engulfed. ec, one of the nine pseudopods." —Davison, 1906

Amaeba Proteus

"Amaeba proteus; B, Amaeba radiosa. n, nucleus. c, contractile vacuole. a, food engulfed. ec, one of…

Amoung the simplest one-celled animals living in the ooze at the bottom of nearly every freshwater stream or pond is the Amoeba, whose body is barely visible to the unaided eye. Here we see the amoeba, highly magnified, showing(c.v.) pulsating vacuole; (f) food particle; (n) nucleus. (7B) The shape of the same individual 30 seconds later.

Amoeba

Amoung the simplest one-celled animals living in the ooze at the bottom of nearly every freshwater stream…

Diagram showing the principal parts of the cell and something of the protoplasmic architecture as it might appear while living. a, alveoli or spheres in the foam-work; c, centrosome; cy, cytoplasmic meshwork, containing granules; nu., nucleus; n, nucleolus; v. vacuole; w, cell wall.

Cell

Diagram showing the principal parts of the cell and something of the protoplasmic architecture as it…

Diagram showing the change which occur in the centrosomes and nucleus of a cell n the process of mitotic division (mitosis). The nucleus represented here has 4 chromosomes.

Cell Division

Diagram showing the change which occur in the centrosomes and nucleus of a cell n the process of mitotic…

"Diagram showing the principal parts of the cell as it appeaers when killed and stained. The protoplasm shows more of a meshwork (cy), the spaces representing the alveoli. f, formed substance in alveoli." -Galloway, 1915

Cell Parts

"Diagram showing the principal parts of the cell as it appeaers when killed and stained. The protoplasm…

"Diagram of cell structure. Pl. Plastids in cytoplasm. cc. Centrosome. n. Nucleolus. Chr. Chromosomes. N. Nucleus. ct. General cytoplasm. V. Vacuole. Gr. Granules." -Thomson, 1916

Cell Structure

"Diagram of cell structure. Pl. Plastids in cytoplasm. cc. Centrosome. n. Nucleolus. Chr. Chromosomes.…

Minute structure of a cell.

Cell, Diagram of

Minute structure of a cell.

"Diagram of flame cell, the internal terminus of the excretory tubules. c, cilia lining tubule; f, special cilia constituting the flame; n, nucleus of flame cell; p, cell processes; v, vacuole or cavity in cell communicating with the capillary tubules (t)." -Galloway, 1915

Flame Cell

"Diagram of flame cell, the internal terminus of the excretory tubules. c, cilia lining tubule; f, special…

"B, older (onion) cells farther back from the root tip. The cytoplasm is becoming vacuolate; f, vacuole." -Stevens, 1916

Onion Cells

"B, older (onion) cells farther back from the root tip. The cytoplasm is becoming vacuolate; f, vacuole."…

"Paramecium in optical section. A, anterior end; c, tilia; e.d., ectosarc; e.n., endosarc; f.v., food "vacuole"; g, gullet; N, meganucleus; n, micronucleus; o, oral groove, leading to the mouth; p.v., pulsating vacuoles in different stages of contraction; tr., trichocysts; v, food vacuole in process of formation." — Galloway

Paramecium

"Paramecium in optical section. A, anterior end; c, tilia; e.d., ectosarc; e.n., endosarc; f.v., food…

"A single root hair on a large scale, showing that it is an outgrowth of an epidermal cell, and the fact that it possesses a living protoplast and large vacuole filled with cell-sap and traversed by cytoplasmic strands. The nucleus is near the apex of the hair." -Stevens, 1916

Plant Root Hair

"A single root hair on a large scale, showing that it is an outgrowth of an epidermal cell, and the…

"Showing a Bit of Common Yeast Cake when mixed with Water and examined under the Microscope. There are large numbers of minute oval bodies, inside of which may commonly be seen one of more smaller bodies knows as <em>vacuoles</em>, shown in <em>a</em> and <em>b</em>. <em>c</em> shows a nucleus, <em>n</em>, inside of the yeast cell; <em>d shows a budding cell with the nucleus dividing; <em>e</em> shows the cell divided, the new cell containing a bit of the old nucleus." &mdash; Blaisedell, 1904

Yeast cake

"Showing a Bit of Common Yeast Cake when mixed with Water and examined under the Microscope. There are…