1. Among the most important intellectual figures of antiquity, he discovered formulas for the area and volume of various geometric figures, applied geometry to hydrostatics and mechanics, devised numerous ingenious mechanisms, such as the Archimedean screw

2. In 1806 Bryan published, also by subscription, and in quarto, Lectures on Natural Philosophy (thirteen lectures on hydrostatics, optics, pneumatics, and acoustics), with a portrait of the author, engraved by Heath, after a painting by T. Kearsley; and there is a notice in it that "Mrs. Bryan educates young ladies at Blackheath."