The word comes from the Greek sphygmós (pulse), plus the scientific term manometer (pressure meter). The device was invented by Samuel Siegfried Karl Ritter von Basch in 1881. Scipione Riva-Rocci introduced a more easily used version in 1896. In 1901, Harvey Cushing modernized the device and popularized it within the medical community.–Wikipedia

Author: WmX

I stumbled off the track to success in 1968, started chasing shadows that summer. Since then, In addition to farm-laborer and newspaper photographer my occupational incarnations include dishwasher, janitor, retail photo clerk, plumber, HVAC repairman, auto mechanic, CAT scan technologist, computer worker and politico (whatever it takes to buy a camera.) I am on the road to understanding black and white photography.