Marvin kite meteorograph, 1898.
© Science Museum / Science & Society Picture Library
In order to investigate the upper air, scientists devised small lightweight instruments which they flew below kites or balloons. This example, designed by C Marvin of New Jersey for use with a kite, measured temperature, humidity, air presure and wind velocity. General view of pens and recording chart. Made by the Schneider Brothers Instrument Company of New Jersey, USA.