Hints on porisms, in a letter to T.S. Davies, Esq., F.R.S., &c., with a scholium not continued in the letter. Being a sequel to the two tracts on "Imaginary quantities," published in 1817 and 1818, as a partial development of views therein noticed.
Gompertz, Benjamin,F.R.S. &c.
London,
1850.