Protractors have been pasted in public places from the North Side to the East End by way of Garfield where John Perry catches his bus by the mailbox. "It might be a marker for certain cans they're ...

As noted in the Introduction, the earliest use of protractors was probably in navigation. Protractors assisted with laying out angles to indicate the actual or desired direction of a ship. Makers ...

Finally, a few protractors in the collections do not obviously belong to any general category, including an object that may not be as old as it appears to be and two instruments that were used by ...