Illustration of a 7 by 7 grid.

7 by 7 Grid

Illustration of a 7 by 7 grid.

Illustration of a 8 by 8 grid.

8 by 8 Grid

Illustration of a 8 by 8 grid.

Illustration of a 9 by 9 grid.

9 by 9 Grid

Illustration of a 9 by 9 grid.

Illustration of an xy grid/graph. It is the Cartesian coordinate system. Neither axis is labeled.

Blank Coordinate Grid

Illustration of an xy grid/graph. It is the Cartesian coordinate system. Neither axis is labeled.

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system. Neither axis is labeled.

Blank Coordinate Grid With Grid Lines Shown

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system. Neither…

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system. Neither axis is labeled.

Blank Coordinate Grid With Grid Lines Shown

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system. Neither…

Illustration of an xy grid/graph. It is the Cartesian coordinate system with both axes labeled.

Coordinate Grid With Axes Labeled

Illustration of an xy grid/graph. It is the Cartesian coordinate system with both axes labeled.

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with both axes labeled.

Coordinate Grid With Axes Labeled And Grid Lines Shown

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with both…

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with both axes labeled.

Coordinate Grid With Axes Labeled And Grid Lines Shown

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with both…

Draftsman's second method for drawing a hyperbola

Hyperbola Second Method

Draftsman's second method for drawing a hyperbola

Draftsman's second method for drawing a parabola

Parabola Second Method

Draftsman's second method for drawing a parabola

"The Actual Size of the Test Type, which shiykd be seen by the Normal Eye at a distance of Twenty Feet." — Blaisedell, 1904

Test type

"The Actual Size of the Test Type, which shiykd be seen by the Normal Eye at a distance of Twenty Feet."…