Public domain photos

The image shows a drawing of a pole with a ruler attached to it, along with numbers and text on a paper. The pole appears to be a catapult, with the ruler likely used to measure the trajectory of the catapult.

The image shows a drawing of a pole with a ruler attached to it, along with numbers and text on a paper. The pole appears to be a catapult, with the ruler likely used to measure the trajectory of the catapult.Open in library