A mathmatecian who achived many things.
He devised a theory of crustal balance which would become the basis for the isostacy principal.
John Pratt died in 1986
John Pratt has written: 'Korea'
John Henry Pratt died in 1871.
John M. Pratt was born in 1886.
John Pratt - cricketer - was born in 1834.
John Henry Pratt was born in 1809.
John H. Pratt was born in 1910.
John Lee Pratt was born in 1879.
John Teele Pratt was born in 1873.
John Teele Pratt died in 1927.
John Lee Pratt died in 1975.
John M. Pratt died in 1954.