Another sign that Daniel was not jealous of members of his own family in the way the Johann Bernoulli and Jacob Bernoulli had been is the fact that he did produce joint work with his younger brother Johann(II) Bernoulli .
Isa pang sign na Daniel ay hindi seloso ng mga kasapi ng kanyang sariling pamilya sa paraan ng Johann Bernoulli at Jacob Bernoulli had been ay ang katunayan na siya ay pinagtambal sa paglikha ng trabaho sa kanyang batang kapatid na lalaki Johann (II) Bernoulli.