ClipArt ETC
James Watt found the boring tool in his blacksmithing to be very difficult. "A young manufacturer named Wilkinson invented a guide for the boring tool, and machined cylinders of fifty inches diameter." -Hill, 1921

Boring Tool

James Watt found the boring tool in his blacksmithing to be very difficult. "A young manufacturer named…

"Two feet long, with the under jaw greatly protruded; it swims near the surface; bites at a hook; makes violent resistance when drawn up, and emits a strong smell when just taken." — Goodrich, 1859

Gar

"Two feet long, with the under jaw greatly protruded; it swims near the surface; bites at a hook; makes…

All lines in a mechanical drawing are made with the aid of an instrument. Horizontal lines are drawn with the upper edge of the T-square blade as a guide.

Drawing a Horizontal Line

All lines in a mechanical drawing are made with the aid of an instrument. Horizontal lines are drawn…

This blackboard marker is a tool used to guide blackboard user while drawing horizontal, vertical and diagonal lines.

Blackboard Marker

This blackboard marker is a tool used to guide blackboard user while drawing horizontal, vertical and…

Vertical lines are drawn by using a triangle held against the T-square.

Drawing a Vertical Line

Vertical lines are drawn by using a triangle held against the T-square.