Frederick Graff
American engineer (1775-1847) · United States · On the map · Scientists · Died at 71
Frederick Graff was an American hydraulic engineer who designed and built the Fairmount Water Works in Philadelphia, Pennsylvania, and unofficially invented the fire hydrant.
Text from Wikipedia, CC BY-SA 4.0
Frederick Graff is read about 6.5 times a day, in 4 languages.
A typical day, 30 days to 20 October 2026
The middle day of the days counted, so one week of news cannot move it. The line under it is the last 60 days, one point a day.
Something wrong?Media & music
Photos 1
About this person
Country
United States
Category
Scientists
Type
Scientist
Status
Deceased
Dates
Lived 1775 to 1847 · aged 71
