This work, numbered E791 by Eneström, was published in two volumes, which together contain 94 numbered treatises and five further "Additamenta." Of these, Eneström considered eight of them to be new to him; these are listed below.
Publications from 1849
E795: De quadratis magicis
E798: De numeris amicibilibus
E799: Fragmenta commentationis cuiusdam maioris, de invenienda relatione enter latera triangulorum, quorum area rationaliter exprimi possit, et de triangulo in quo rectae ex singulis angulis latera opposita bisecantes sint rationales