From Italy , in 1858 Giusto Bellavitis responded to connect Hamilton 's vector theory with his theory of equipollences of directed line segments .
Nevertheless , these new algebras from Cockle were , in fact , to be found inside Hamilton 's biquaternions .
From Italy , in 1858 Giusto Bellavitis responded to connect Hamilton 's vector theory with Hamilton 's theory of equipollences of directed line segments .
Nevertheless , these new algebras from Cockle were , in fact , to be found inside Hamilton 's biquaternions .