ClipArt ETC
"Life history of a frog. Newly hatched forms hanging to water-weeds. Stages with external gills." -Thomson, 1916

Frog Stage 2

"Life history of a frog. Newly hatched forms hanging to water-weeds. Stages with external gills." -Thomson,…

"Diagram illustrating gills or branchiae. b.c., cavity in which the body fluids circulate; br., branchial filaments which are merely much thinned out-pocketings of the body wall (w); ex, the external medium–water–in which the oxygen is dissolved." -Galloway, 1915

Gills or Branchiae

"Diagram illustrating gills or branchiae. b.c., cavity in which the body fluids circulate; br., branchial…

"Diagram of the anatomy of Amphioxus, drawn as a semi-transparent object. a, anus; a.p., atrial pore; c.f., caudal fin; cir., cirri, on the edge of the vestibule leading to the mouth; d.f., dorsal fin; r, fin rays; g, gill or branchial structures consisting of alternate slits, through which the water passes, and supporting pates, in the walls of which are the blood vessels; in., intestine, from which as a diverticulum springs l., the liver; m, the mouth surrounded by a ringed velum; my., myotomes or muscle segments; n.c., notochord; o., ovaries; s.c., spinal cord; v.f., ventral fin." -Galloway, 1915

Lancelet

"Diagram of the anatomy of Amphioxus, drawn as a semi-transparent object. a, anus; a.p., atrial pore;…

A tailed amphibian, the Necturus.

Necturus

A tailed amphibian, the Necturus.

A thirsty lion slowly bringing himself to drink some water.

Thirsty Lion

A thirsty lion slowly bringing himself to drink some water.

"A family of bears not far from the camp frolicked and splashed in a shallow natural basin." -University Society, 1912

Bear Family

"A family of bears not far from the camp frolicked and splashed in a shallow natural basin." -University…

"Fresh-water polype (hydra), two specimens, the one expanded the other contracted, showing multiplication by buddin. bd1 bd2 bd3, buds in various stages of growth." -Parker, 1900

Freshwater Polyp

"Fresh-water polype (hydra), two specimens, the one expanded the other contracted, showing multiplication…

"Transverse section through the wall of a cylinder (parallel with the course of the canals), showing one incurrent canal (IC), and one radial (R) throughout their length; sp, triradiate spicules; sp', oxeote spicules of dermal cortex (dc); sp'', tetraradiate spicules of gastral cortex (gc); ec, ectoderm; en, endoderm; pm, pore membrane; pp, prosopyles; ap, apopyle; di, diaphragm; exc, excurrent passage; PG, paragastric cavity; em, early embryo; em, late embryo. The arrows indicate the course of the water through the sponge." -Parker, 1900

Sycon Gelatinosum

"Transverse section through the wall of a cylinder (parallel with the course of the canals), showing…

"Vertical section of a fresh-water sponge (Spongilla), showing the arrangement of the canal-system. C, ciliated chambers; DP, dermal pores; Ex, excurrent canals; GO, openings of the excurrent canals; PG, paragastric cavity; SD, subdermal cavities; O, osculum." -Parker, 1900

Spongilla

"Vertical section of a fresh-water sponge (Spongilla), showing the arrangement of the canal-system.…

Of the Evening Primrose family (Onograceae), the water purslane (Ludwigia palustris).

Water Purslane

Of the Evening Primrose family (Onograceae), the water purslane (Ludwigia palustris).

Of the Parsley family (Umbelliferae), the water parsnip (Sium cicutaefolium).

Water Parsnip

Of the Parsley family (Umbelliferae), the water parsnip (Sium cicutaefolium).

Of the Parsley family (Umbelliferae), the cutleaf water parsnip (Berula erecta).

Cutleaf Water Parsnip

Of the Parsley family (Umbelliferae), the cutleaf water parsnip (Berula erecta).

Of the Parsley family (Umbelliferae), the water pennywort (Hydrocotyle Americana).

Water Pennywort

Of the Parsley family (Umbelliferae), the water pennywort (Hydrocotyle Americana).

Of the Mint family (Labiatae), the leaf of the water mint (Mentha aquatica.

Water Mint Leaf

Of the Mint family (Labiatae), the leaf of the water mint (Mentha aquatica.

Of the Mint family (Labiatae), the lower leaf of the cut-leaved water horehound (Lycopus americanus).

Cut-Leaved Water Horehound Leaf

Of the Mint family (Labiatae), the lower leaf of the cut-leaved water horehound (Lycopus americanus).

Of the Lobelia family (Lobeliaceae), the water lobelia (Lobelia Dortmanna).

Water Lobelia

Of the Lobelia family (Lobeliaceae), the water lobelia (Lobelia Dortmanna).

Of the mud plantain family (Heteranthera), the water stargrass (Heteranthera dubia).

Water Stargrass

Of the mud plantain family (Heteranthera), the water stargrass (Heteranthera dubia).

"Germinating peas, growing in water, one deprived of its cotyledons." -Bergen, 1896

Germinating Peas

"Germinating peas, growing in water, one deprived of its cotyledons." -Bergen, 1896

"Egg on beaker of water, to show osmosis." -Bergen, 1896

Osmosis

"Egg on beaker of water, to show osmosis." -Bergen, 1896

A freshwater hydra, magnified. Example of an animal with no skeleton. There are animals without a skeleton that are not able to accomplish very powerful motions. Mot of them live in water where they are partly or wholly held up by the water and have only slow motions. Most are also very small and generally have no muscles.

Freshwater Hydra

A freshwater hydra, magnified. Example of an animal with no skeleton. There are animals without a skeleton…

"White water-lily. The inner petals and the stamens growing from the ovary." -Bergen, 1896

White Waterlily

"White water-lily. The inner petals and the stamens growing from the ovary." -Bergen, 1896

"Transition from petals to stamens in white water-lily. E, F, G, H, various steps between petal and stamen." -Bergen, 1896

Petals to Stamens

"Transition from petals to stamens in white water-lily. E, F, G, H, various steps between petal and…

Capillarity. On the left, water is higher in the smaller tubes due to adhesion. On the right, mercury has the opposite effect because of its cohesive properties.

Capillarity

Capillarity. On the left, water is higher in the smaller tubes due to adhesion. On the right, mercury…

The largest rodent, the capybara.

Capybara

The largest rodent, the capybara.

The double-crested cormorant, a diving water bird.

Cormorant

The double-crested cormorant, a diving water bird.

"The stick AB appears bent at C, on account of the refraction caused by the water. The eye sees the end B in the direction of the refracted ray, and it appears at D instead of where it really is." -Foster, 1921

Refraction

"The stick AB appears bent at C, on account of the refraction caused by the water. The eye sees the…

Silver Springs is a clear basin within the St. Johns River in Florida. It is famed for its depth and clarity of the water. This spring is seventy feet deep, as clear as crystal, and remarkably fresh and cool.

Silver Springs, Florida

Silver Springs is a clear basin within the St. Johns River in Florida. It is famed for its depth and…

"The first sensation in descending under water in a suit of armor is the sudden, bursting roar in the ears, cause by the air driven into the helmet from the air-pump. The flexible air-hose has to be strong enough to bear the pressure of twenty-five to fifth pounds to the square inch." -Lupton

Early Scuba diving

"The first sensation in descending under water in a suit of armor is the sudden, bursting roar in the…

"Waterspouts are whirlwinds occurring on the sea or on lakes. When fully formed they appear as tall as pillars of clouds stretching from the sea to the sky, whirling round their axes, and exhibiting the progressive movement of the whole mass precisely as in the case of the dust whirlwind." -Lupton

Waterspouts

"Waterspouts are whirlwinds occurring on the sea or on lakes. When fully formed they appear as tall…

"An instrument of the pump kind for raising water, especially when that liquid is mixed with solid matter. It acts by the condensation of waste steam sent into a reservoir, the water rushing up into the vacuum formed by the condensation." -Marshall

Water Pulsometer

"An instrument of the pump kind for raising water, especially when that liquid is mixed with solid matter.…

"A contrivance for raising liquids or for removing gases from vessels." -Marshall

Suction Pump

"A contrivance for raising liquids or for removing gases from vessels." -Marshall

"The force-pump differs from others in having its piston solid, or without a valve, and also in having a side pipe with a valve opening outwards, through which the water is forced to any height required, or against any pressure that may oppose it." -Marshall

Steam-engine Force Pump

"The force-pump differs from others in having its piston solid, or without a valve, and also in having…

An instrument used to measure the quantity of a rain which falls at a given place. They are which falls at a given place. They are variously constructed. A convenient form (shown in figure) consists of a cylindrical tube of copper, with a funnel at the top where the rain enters. Connected with the cylinder at the lowest part is a glass tube with an attached scale.

Rain Gauge

An instrument used to measure the quantity of a rain which falls at a given place. They are which falls…

"A tower or other elevated structure bearing a light at the top and erected at the entrance of a harbor or on some rock or headland to serve as a guide or warning of danger to navigators at night." -Foster, 1921

Lighthouse

"A tower or other elevated structure bearing a light at the top and erected at the entrance of a harbor…

The American lotus or Nelumbo lutea.

American Lotus

The American lotus or Nelumbo lutea.

Device for transferring water up from a lower body.

Archimedean Screw

Device for transferring water up from a lower body.

"Atoll, a coral reef surrounding a pool of shallow water, usually called a lagoon. The atoll is formed by the building of a coral reef on a circular or nearly circular foundation. It is usually broken in one or more places so that the lagoon is connected with the surrounding waters." -Foster, 1921

Atoll

"Atoll, a coral reef surrounding a pool of shallow water, usually called a lagoon. The atoll is formed…

A wading bird found in warm climates.

Avocet

A wading bird found in warm climates.

The barker's mill is a device that rotates as water is poured in at top and comes out in opposite directions at the bottom.

Barker's Mill

The barker's mill is a device that rotates as water is poured in at top and comes out in opposite directions…

The servant meets Rebekah in the Bible story, The Marriage of Isaac.

Rebekah

The servant meets Rebekah in the Bible story, The Marriage of Isaac.

A piece of cloth or tissue of some kind spread to the wind to impel or assist in impelling a vessel through the water.

Ship Sails

A piece of cloth or tissue of some kind spread to the wind to impel or assist in impelling a vessel…

The name given to various animals included in the class Amphibia and in the order Urodela of that class. The salamanders may be divided into the land salamander and the water salamanders.

Cold Blooded Salamander

The name given to various animals included in the class Amphibia and in the order Urodela of that class.…

An apparatus which, being fitted to ships and driven by steam, propels them through the water.

Screw-propeller

An apparatus which, being fitted to ships and driven by steam, propels them through the water.

A water tap.

Water Tap

A water tap.

In breathing, the mouth and gills of a fish open alternately; the water entering the mouth escapes by the opening of the gills. Shown is a section of the bronchial arch of a cod, with a pair processes supporting leaflets or plates. Labels: 1. A section of the branchial arch. 2, A pair of processes. 3, Branchial leaflets or plates. The number of leaflets in one process of the cod is about one thousand; in the salmon fourteen hundred; in the sturgeon sixteen hundred.

Section of a Branchial Arch of a Cod

In breathing, the mouth and gills of a fish open alternately; the water entering the mouth escapes by…

"Normal twig-like branching of streamlets—the type produced in homogenous rock material when uninfluenced by geological structure planes." -Walcott, 1901

Streamlet Branching

"Normal twig-like branching of streamlets—the type produced in homogenous rock material when uninfluenced…

"Streamlet branchings of the abnormal type found in the area in and about the Pomperaug Valley. a and i, streamlets controlled by two sets or airs of fault planes. b and c, streamlets preponderantly controlled by a single series of parallel planes; d, f, and h, by a nearly rectangular system of fault planes. e and g, streamlets indicating that neighboring streamlet branchings have been controlled by the same fault plane. The side streamlets of g indicate control by a second series of faults." -Walcott, 1901

Streamlet Branchings

"Streamlet branchings of the abnormal type found in the area in and about the Pomperaug Valley. a and…

"Drainage which has been influenced by joints." -Walcott, 1901

Drainage Streamlets

"Drainage which has been influenced by joints." -Walcott, 1901

"Roots of the water-hyacinth (Eichornia crassipes Solms), showing removable root-caps; b, root-cap removed from c." -Gager, 1916

Water Hyacinth Roots

"Roots of the water-hyacinth (Eichornia crassipes Solms), showing removable root-caps; b, root-cap removed…

"Diagram to illustrate a root-hair (h) in the soil, and its relation to the soil-particles, the capillary film of water (w), and the air spaces (a); e, epidermal cell of the root, of which the root-hair is an out-growth, or branch." -Gager, 1916

Roots in Soil

"Diagram to illustrate a root-hair (h) in the soil, and its relation to the soil-particles, the capillary…

Part of a striped muscle fiber of a water beetle prepared with absolute alcohol. Labels: A, sarcolemma; B, Krause's membrane. The sarcolemma shows regular bulgings. Above and below Krause's membrane are seen the transparent "lateral discs". The chief mass of a muscular compartment is occupied by the contractile disc composed of sarcous elements. The substance of the individual sarcous elements has collected more at the extremity than in the center: hence this latter is ore transparent. The optical effect of this is that the contractile disc appears to posses a "median disc" (Disc of Hensen). Several nuclei of muscle corpuscles, C and D, are shown, and in them a minute network.

Striped Muscular Fiber of a Beetle

Part of a striped muscle fiber of a water beetle prepared with absolute alcohol. Labels: A, sarcolemma;…

If the red blood cells of a frog be first exposed to the action of water vapor (which renders their outer pellicle more readily permeable to gases), and then acted on by carbonic acid, the nuclei immediately become clearly defined and strong granulated, when air or oxygen is admitted the original appearance is at once restored. The upper and lower cells in this figure show the effect of carbonic acid; the middle one the effect of the readmission of air. The effects can be reproduced five or six times in succession. If, however, the action of the carbonic acid be much prolonged, the granulated of the nucleus become permanent; it appears to depend on a coagulation of the paraglobulin.

Effect of Gases on Red Blood Cells

If the red blood cells of a frog be first exposed to the action of water vapor (which renders their…

This Toilet-stand clock-case was made during the German Renaissance in 1597. A slender tall cabinet, the upper and lower parts of which are provided with doors, which holds various necessary objects, while the center takes the form of a niche. Inside the niche hangs a metal water-reservoir with a lid and a drain. It also includes metal wrought-iron towel-holders.

Toilet-Stand Clock-Case

This Toilet-stand clock-case was made during the German Renaissance in 1597. A slender tall cabinet,…

This Toilet-stand clock-case was made during the German Renaissance. Made of various colored wood, it was a slender tall cabinet where the upper and lower parts included doors, which holds various necessary objects. The center takes the form of a niche and inside the niche hangs a metal water-reservoir with a lid and a drain. It also includes metal wrought-iron towel-holders.

Toilet-Stand Clock-Case

This Toilet-stand clock-case was made during the German Renaissance. Made of various colored wood, it…

"Anthoceros fusiformis. Portion of lamellate, cristate thallus, which easily retains water." -Gager, 1916

Anthoceros fusiformis

"Anthoceros fusiformis. Portion of lamellate, cristate thallus, which easily retains water." -Gager,…

"Diagram illustrating the gradual filling up of lakes by the encroachment of vegetation, and also the stages in the origin of peat and marl deposits in lakes. The several plant associations of the Bog series, displacing one another, belong to the following major groups: (I) O. W., open water succession; (2) M., marginal succession; (3) S., shore succession; (4) B., bog succession, comprising the bog-meadow (Bm), bog-shrub (Bs) and bog-forest (Bf); and (5) M. F., mesophytic forest succession." -Gager, 1916

Lake and Vegetation

"Diagram illustrating the gradual filling up of lakes by the encroachment of vegetation, and also the…

"The Molluscous Gasteropoda have the organs of respiration formed for aerial respiration or for respiration under water. A magic influence was attributed to them; they were supposed , for instance, to have an influence over the female heart."

Aplysia Depilans (Linn.)

"The Molluscous Gasteropoda have the organs of respiration formed for aerial respiration or for respiration…

"The Molluscous Gasteropoda have the organs of respiration formed for aerial respiration or for respiration under water. Some of the species were known to the ancients as Sea-hares."

Aplysia Inca (D'Orbigny)

"The Molluscous Gasteropoda have the organs of respiration formed for aerial respiration or for respiration…

The shell of the Planorbis is thin, light and disk-like in form. The can creep along solid bodies, or swim upside-down through the water.

Planorbis Corneus (Linnaeus)

The shell of the Planorbis is thin, light and disk-like in form. The can creep along solid bodies, or…

Apparatus used for distillation, separating liquid from the impurities contained in it. A, reservoir; B, light for heating; C, connecting tube; D, steam passes into; E, pipe where cold water is supplied; F, discharged liquid; H, pure water.

Distillation

Apparatus used for distillation, separating liquid from the impurities contained in it. A, reservoir;…