ClipArt ETC
A drawing of a landscape showing the proper position for the horizontal line.

Horizontal Line

A drawing of a landscape showing the proper position for the horizontal line.

Illustration depicting horizontal landscape.

Horizontal Line

Illustration depicting horizontal landscape.

Setting trees to a line

Tree Planting

Setting trees to a line

Ear found on the basal segment of grasshopper abdomen.

Sensory Organs of Insects

Ear found on the basal segment of grasshopper abdomen.

Diagrammatic section through an arm of the lophophore of Crania. 1, the lip; 2, the base of a tentacle bisected in the middle line; 3, great arm-sinus; 4, small arm-sinus, containing muscle-fibres; 5, tentacular canal; 6, external tentacular muscle; 7, tentacular blood-vessel arising from the cut arm-vesel in the small arm-sinus; 8, chief arm-nerve; 9, secondary arm-nerve; 10, under arm-nerve.

Brachiopoda

Diagrammatic section through an arm of the lophophore of Crania. 1, the lip; 2, the base of a tentacle…

Terebratulina, the turning forward of the second or mantle segment

Brachiopoda

Terebratulina, the turning forward of the second or mantle segment

Terebratulina, the turning forward of the second or mantle segment

Brachiopoda

Terebratulina, the turning forward of the second or mantle segment

Terebratulina, the turning forward of the second or mantle segment

Brachiopoda

Terebratulina, the turning forward of the second or mantle segment

Terebratulina, completion of the mantle segment stages

Brachiopoda

Terebratulina, completion of the mantle segment stages

Stamens of the mint family. Of a Monarda: the two anther-cells with bases divergent so that they are transverse to the filament, and their contiguous tips confluent, so as to form one cell opening by a continuous line. Fig 301; Of a Calamintha: the broad connective separating the two cells. Fig 302; Of a Sage (Salvia Texana; with long and slender connective resembling forks of the filament, one bearing a good anther-cell wholly wanting. Fig 304; Of a White Sage, Audibertia grandiflora; the lower fork of connective a mere vestige. Fig. 305; Of another White Sage (A. stachyoides), the lower fork of connective suppressed.

Stamens

Stamens of the mint family. Of a Monarda: the two anther-cells with bases divergent so that they are…

The shape of the earth is that of a round ball or sphere slightly flattened at two opposite sides. Such a body is termed a <em>spheroid</em>. There are two kinds of spheroids-<em>oblate</em> and <em>prolate</em>; the former as the shape of an orange, the latter that of a lemon. The straight line that runs through the centre of a sphere or spheroid and terminates at the circumference is called the <em>diameter</em>. If the sphere rotates-that is, moves around like a top-the diameter on which it turns is called the <em>axis</em>. In the oblate spheroid the axis is the shorter diameter; in the prolate spheroid the axis is the longer diameter.

Oblate and Prolate Spheroid

The shape of the earth is that of a round ball or sphere slightly flattened at two opposite sides. Such…

This is a line engraving by Sir Anthony Van Dyck. Pictures is Elizabeth, the wife of William Cavendish. The original engraving was done by Pierre Lombard.

Elizabeth, Countess of Devonshire

This is a line engraving by Sir Anthony Van Dyck. Pictures is Elizabeth, the wife of William Cavendish.…

This is a line engraving by Sir Anthony Van Dyck. The picture is one of many done for Charles I. The original picture can be found in the Louvre

Charles I Attended by the Marquis of Hamilton

This is a line engraving by Sir Anthony Van Dyck. The picture is one of many done for Charles I. The…

Section through the Head and Neck on the Median Line. 1. Medulla Oblongata 2. Pons 3. Right lobe of cerebrum 4. Cerebellum in section 5. Blood vessel 6. Corpus Striatum 7. Nasal Passage 8. Nasal bone 9. Soft Palate 10. Hard Palate 11. Tongue 12. Epiglottis 13. Os Hyoides 14. Oesaphagus 15. Spinal 16. Larynx 17. Windpipe

Sectional view of the Head

Section through the Head and Neck on the Median Line. 1. Medulla Oblongata 2. Pons 3. Right lobe of…

During new and full moon, the earth, moon, and sun are all in the same straight line, but, that during the first and last quarters, they are at right angles. The portions of the earth and moon turned toward the sun are illumined, the shaded portions are in the darkness. To an observer on the earth, the moon, at <em>a</em>, appears new, since the dark part is turned toward the person; at <em>b</em>, however, it must appear full, since the illumined portions are toward the person. At <em>c</em>, and <em>d</em>, the positions of the quarters, only one-half of the illumined half, or one quarter, is seen.

Cause of the Phases of the Moon

During new and full moon, the earth, moon, and sun are all in the same straight line, but, that during…

A sailor being tossed a life line after ship wrecked.

Shipwrecked Sailor

A sailor being tossed a life line after ship wrecked.

Diagram of a shoot with its leaves 5-ranked, with a spiral line drawn from the attachment of one leaf to the next, and so only the parts on the side turned from the eye are fainter.

Five-ranked

Diagram of a shoot with its leaves 5-ranked, with a spiral line drawn from the attachment of one leaf…

A ground-plan of the 5-ranked shoot; the section of the leaves; a dotted line drawn from the edge of one leaf to that of the next marks out the spiral.

Five-ranked

A ground-plan of the 5-ranked shoot; the section of the leaves; a dotted line drawn from the edge of…

Diagram of the calyx and corolla, the place for the missing petal marked by a dotted line.

Larkspur

Diagram of the calyx and corolla, the place for the missing petal marked by a dotted line.

Epilachne borealis, segment to show arrangement of spines.

Squash Beetle

Epilachne borealis, segment to show arrangement of spines.

Alypia octo-maculata, 8-spotted forester; segment of larva.

Moth

Alypia octo-maculata, 8-spotted forester; segment of larva.

Wing of an owlet-moth, with all the markings defined and named.-Right wings: b, basal line; t.a., transverse anterior line; m, median line or shade; t.p., transverse posterior line; st., sub-terminal line; t., terminal line; sm., sub-median vein; apex of hind wing; o.m., outer margin; i.m., inner margin. Left wings: b.d., basal dash; cl., claviform; or., orbicular spot; ren., reniform spot; ap., apical spot; c.m., costal margin; o.m., outer margin; i.m. inner margin; h.a., hind angle; d.s., discal spot; e.l., exterior line; an., anal angle.

Owlet Moth

Wing of an owlet-moth, with all the markings defined and named.-Right wings: b, basal line; t.a., transverse…

The fall army-worm; body segment.

Armyworm

The fall army-worm; body segment.

The fall army-worm; body segment.

Armyworm

The fall army-worm; body segment.

The garden web-worm of the Loxostege similalis species; segment of larva.

Webworm

The garden web-worm of the Loxostege similalis species; segment of larva.

The garden web-worm of the Loxostege similalis species; segment of larva.

Webworm

The garden web-worm of the Loxostege similalis species; segment of larva.

The grape plume of the Oxyptilus periscelidactylus species; single segment of larva.

Grape Plume

The grape plume of the Oxyptilus periscelidactylus species; single segment of larva.

The cross-ratio of four points in a line is equal to the cross-ratio of their projections on any other line which lies in the same plane with it.

Cross-Ratio Four Points

The cross-ratio of four points in a line is equal to the cross-ratio of their projections on any other…

A line moves in a plane and it therefore envelopes a plane curve.

Plane Curve

A line moves in a plane and it therefore envelopes a plane curve.

Five points are given, of which not three are in a line, a curve of second order may be drawn through all of them.

Second Order Curve

Five points are given, of which not three are in a line, a curve of second order may be drawn through…

The three points in which any line cuts the sides of a triangle and the projections, from any point in the plane, of the vertices of the triangle on to the same line are six points in involution.

Involution

The three points in which any line cuts the sides of a triangle and the projections, from any point…

The lines which join corresponding points in an involution on a conic all pass through a fixed point; and reciprocally, the points of intersection of conjugate lines in an involution among tangents to a conic lie on a line.

Conic Involution

The lines which join corresponding points in an involution on a conic all pass through a fixed point;…

The segments between the point of intersection of two tangents to a conic and their points of contact are seen from a focus under equal angles. the ratio of the distances of any point on a conic from a focus and the corresponding directrix is constant.

Parabola Foci Properties

The segments between the point of intersection of two tangents to a conic and their points of contact…

Two planes lie perpendicular to one another. A line perpendicular to plane 1 and a line perpendicular to plane 2 will meet at a point, A, and form a perpendicular intersection.

Perpendicular Planes

Two planes lie perpendicular to one another. A line perpendicular to plane 1 and a line perpendicular…

To find the projections of a line which joins two points, A, B given by their projections.

Line Projection

To find the projections of a line which joins two points, A, B given by their projections.

The straight line is the simplest type of locus and the simplest first degree equation.

Straight Line

The straight line is the simplest type of locus and the simplest first degree equation.

Illustration 1 of the Dedekind axiom.

Dedekind Property 1

Illustration 1 of the Dedekind axiom.

Illustration 2 of the Dedekind axiom.

Dedekind Property 2

Illustration 2 of the Dedekind axiom.

Illustration 3 of the Dedekind axiom.

Dedekind Property 3

Illustration 3 of the Dedekind axiom.

Illustration 4 of the Dedekind axiom.

Dedekind Property 4

Illustration 4 of the Dedekind axiom.

Uniting the theories of partial polygons of resistance and centres and lines of resistance, this buttress of blocks illustrates the tangential curve that is the line of pressures.

Buttress of Blocks

Uniting the theories of partial polygons of resistance and centres and lines of resistance, this buttress…

The lines of contact are equal, but the axes are neither parallel to each other, or the line of contact.

Lateral Sliding Contact

The lines of contact are equal, but the axes are neither parallel to each other, or the line of contact.

Aronhold stated if any three bodies have plane motion their three virtual centers are three points on one straight line

Centrodes

Aronhold stated if any three bodies have plane motion their three virtual centers are three points on…

Method to draw the bisector of a line

Bisect A Line

Method to draw the bisector of a line

Method to construct an equilateral triangle

Construct Equilateral Triangle

Method to construct an equilateral triangle

Method to construct an isosceles triangle

Construct Isosceles Triangle

Method to construct an isosceles triangle

Draftsman's method to draw a line tangent to two given circles

Tangent To Two Circles

Draftsman's method to draw a line tangent to two given circles

Three dimensional representation of the intersecting planes required to create the conic sections hyperbola, parabola, ellipse, and circle.

Conic Sections 3D

Three dimensional representation of the intersecting planes required to create the conic sections hyperbola,…

Draftsman's first method for creating an ellipse

Ellipse First Method

Draftsman's first method for creating an ellipse

Draftsman's second method for drawing an ellipse

Ellipse Second Method

Draftsman's second method for drawing an ellipse

Draftsman's third method for drawing an ellipse

Ellipse Third Method

Draftsman's third method for drawing an ellipse

Draftsman's fourth method for drawing an ellipse, case 1

Ellipse Fourth Method Case 1

Draftsman's fourth method for drawing an ellipse, case 1

Draftsman's fourth method for drawing an ellipse, case 2

Ellipse Fourth Method Case 2

Draftsman's fourth method for drawing an ellipse, case 2

Draftsman's fourth method for drawing an ellipse, case 3

Ellipse Fourth Method Case 3

Draftsman's fourth method for drawing an ellipse, case 3

Draftsman's fifth method for drawing an ellipse

Ellipse Fifth Method

Draftsman's fifth method for drawing an ellipse

Draftsman's first method for drawing a parabola

Parabola First Method

Draftsman's first method for drawing a parabola

Angle of degree 180

Angle Degrees 180

Angle of degree 180

"The warmer current ascends, as indicated by the small arrows, and curls at the black wreath (u) of cloud, and then the commingling of the two currents forms an imposing dark dome (v) of cloud, from which heavy rain (r) or hail descends. The light grayish cloud which is seen behind the black wreath is the rain descending from the dark dome. The heavy raindrops bring down a large quantity of cold air, which flies straight out in advance of the storm, and produces the squall (q) indicated by the long arrow."&mdash;Finley, 1917

Line squall

"The warmer current ascends, as indicated by the small arrows, and curls at the black wreath (u) of…

Sternum, front and side view. The sternum, or breast bone, is a flat narrow bone, situated in the median line in the front of the chest, and consisting, in the adult, of 3 portions.

Human Sternum Bone

Sternum, front and side view. The sternum, or breast bone, is a flat narrow bone, situated in the median…

"Lines of force of a circular loop. If a current flow through the loop in the direction indicated, the lines of force both inside and outside the loop, will cross the plane of the loop at right angles, and all those which cross the loop on the inside will pass through the plane in one direction...while all on the outside will return through the plane in the opposite direction." -Hawkins, 1917

Lines of Force

"Lines of force of a circular loop. If a current flow through the loop in the direction indicated, the…