There does still exist a letter which Torricelli wrote to Galileo on 11 September 1632 and it gives us some very useful information about Torricelli's scientific progress.
Doon ay umiiral pa rin ng isang sulat na Torricelli wrote sa Galileo on 11 September 1632 at ito ay nagbibigay sa amin ng ilang tunay na kapaki-pakinabang na impormasyon tungkol sa Torricelli ng agham-unlad.