Beautiful flower studies by Dutch artist Jan van Huysum. The images belong to the British Museum. Huysum was born in the Amsterdam in 1682 and became known for his paintings of lavish flower arrangements.
Antique scientific illustration depicting the Construction of a Sundial, A sundial is a device that tells the time of day by the apparent position of the Sun in the sky. In the narrowest sense of the word it consists of a flat plate (the dial).
Office display: NASA/Glenn Research Center. April 30, 1970