Zhang Heng, Chinese scientist

Zhang Heng, Chinese scientist

H426/0017 Rights Managed

Request low-res file

530 pixels on longest edge, unwatermarked

Request/Download high-res file

Uncompressed file size: 51.4MB

Downloadable file size: 4.6MB

Price image Pricing

Please login to use the price calculator


Credit: SCIENCE PHOTO LIBRARY

Caption: Zhang Heng (78-139), Chinese scientist, examining his seismoscope. Zhang was born in Nanjing, China. As an astronomer he saw that the source of the Moon's light was sunlight and as a mathematician he calculated pi as 3.146. However, it was in the field of geophysics that Zhang made his biggest contribution. In 132 he invented the first seismoscope for measuring earthquakes (seen here). The instrument was two metres in diameter, with metal balls balanced in each of the eight dragon's mouths. Strong seismic tremors caused a ball to be released from the mouth of a dragon into the mouth of the toad below. The position of the ball falling indicated the direction of the shock wave.

Release details: Model release not required. Property release not required.

Keywords: 1st century, 2nd century, adult, artwork, astronomer, black-and-white, china, chinese, device, early earthquake seismograph, equipment, examine, examining, geophysicist, geophysics, historical, history, human, illustration, instrument, inventor, male, man, mathematician, monochrome, moonlight, nanyang, one, oriental, pi, pioneer, scientist, seismology, single, zhang heng

Licence fees: A licence fee will be charged for any media (low or high resolution) used in your project.