 Axes showing trigonometric angles, and quadrants. ### Ax

An iron tool with a steel edge, for hewing and chopping. ### Axes of Symmetry of a Cube

Diagram showing all of the different axes of symmetry of a cube. ### Four Axes

An illustration of four various axes: "1, Horseman's hammer of about the time of Edward IV; 2, Martel-de-fer,… ### Rectangular Axes

Transforming from one set of rectangular axes to another with the same origin, but different direction. ### Bronze Age Bronze Celts

Three bronze celts (axes). Not drawn to scale. ### Conic Axes

Conjugate diameters perpendicular to each other are called, axes, and the points where they cut the… ### Bronze Age Copper Axes

Copper axes from the Bronze age. Not drawn to scale. ### Crystallographic Axes of Reference

"...take any three edges formed by the intersection of three faces of a crystal. These axes are called… ### Cube

"Science has succeeded in classifying the thousands of known crystals in six systems, to each of which… ### Ellipse With Axes

Illustration of an ellipse with major and minor axes. ### Construction Of Ellipse

Illustration used to show how to draw an ellipse when given the diameters. ### Construction Of Ellipse

Illustration used to show how to draw an ellipse by circular arcs. ### Construction of an Ellipse

Diagram showing how to construct an ellipse when given the two foci and the length of the major axis… ### 2 Ellipses With Equal Vertical Axes

An illustration of 2 ellipses that have the equal vertical axes, but different horizontal axes. The… ### 2 Ellipses With Equal Vertical Axes

An illustration of 2 ellipses that have the equal vertical axes, but different horizontal axes. The… ### 3 Concentric Ellipses

An illustration of 3 concentric ellipses that are tangent at the end points of the vertical axes. The… ### 3 Concentric Ellipses

An illustration of 3 concentric ellipses that are tangent at the end points of the vertical axes, which… ### 3 Concentric Ellipses

An illustration of 3 concentric ellipses that are tangent at the end points of the vertical axes. The… ### 4 Concentric Ellipses

An illustration of 4 concentric ellipses that are tangent at the end points of the vertical axes. The… ### 4 Concentric Ellipses

An illustration of 4 concentric ellipses that are tangent at the end points of the vertical axes. The… ### 4 Concentric Ellipses

An illustration of 4 concentric ellipses that are tangent at the end points of the vertical axes, which… ### 5 Concentric Ellipses

An illustration of 5 concentric ellipses that are tangent at the end points of the vertical axes. The… ### 5 Concentric Ellipses

An illustration of 5 concentric ellipses that are tangent at the end points of the vertical axes, which… ### 6 Concentric Ellipses

An illustration of 6 concentric ellipses that are tangent at the end points of the vertical axes. The… ### 6 Concentric Ellipses

An illustration of 6 concentric ellipses that are tangent at the end points of the vertical axes, which… ### First Right Square Octahedron

"Science has succeeded in classifying the thousands of known crystals in six systems, to each of which… ### First Right Square Prism

"Science has succeeded in classifying the thousands of known crystals in six systems, to each of which… ### Hatchet

A small axe with a short handle, to be used with one hand. ### Hemimorphism in the Direction of the Vertical Axis

Hemimorphism in the direction of the vertical axis has been observed on crystals of the tetragonal salt,… ### Construction of a Hyperbola

Diagram showing how to construct a hyperbola when given the two foci and the length of the major axis… ### Mattock

A kind of pick-axe, having the iron ends broad, instead of pointed. ### Monoclinic Axes and Hemi-pyramid

"Prisims with edges parallel to neither of the axes OX and OY...are usually called hemi-pyramids." -The… ### Construction Of Oval

Illustration used to show how to draw an egg-shaped oval when given the diameters. ### Orthohombie prism

"Crystal faces are described according to their relations to the crystallographic axes. A series of… ### Orthorhombie pyramid

"Crystal faces are described according to their relations to the crystallographic axes. A series of… ### Symmetry of pyritohedral class

"The symmetry of the Pyritohedral class is as follows: The three crystal axes of binary symmetry; the… ### Regular Octahedron

"Science has succeeded in classifying the thousands of known crystals in six systems, to each of which… ### Regular Tetrahedron

"Science has succeeded in classifying the thousands of known crystals in six systems, to each of which… ### Rhombic Dodecahedron

"Science has succeeded in classifying the thousands of known crystals in six systems, to each of which… ### Second Right Square Octahedron

"Science has succeeded in classifying the thousands of known crystals in six systems, to each of which… ### Second Right Square Prism

"Science has succeeded in classifying the thousands of known crystals in six systems, to each of which… ### Shoe Block

"Nautically, a block with two sheaves, whose axes are at right angles to each other, used for the buntlines… ### Neolithic Implements Stone and Horn Ax and Hammer

Stone and horn ax and hammer. A Neolithic age implement. Not drawn to scale. ### Symmetry of tetrahedral class

"The symmetry of this class is as follows: The three crystallographic axes are axes of binary symmetry;… ### Transform Coordinates

Transformation of coordinates to new axes. ### Umbels

"Umbel is formed when the secondary axes originate from the same point on the stem, and rise to nearly…