Distinguish stable equilibrium from unstable equilibrium.

1586, the experiment proved that two balls with different weights landed at the same time, earlier than Galileo.

The paradox of hydrostatics was put forward in De Beghinselen des Waterwichts (principle of hydrostatics, 1586).

Write a pamphlet De Thiende to promote decimal mark.

Create Dutch translations of many mathematical terms. This makes Dutch the only Western European language whose source of most mathematical terms is not Latin, such as the word "wiskunde" and the diameter "middellijn" (the line passing through the center).

The law of twelve averages was clearly put forward in De Spiegheling der Singconst, almost at the same time as that of Zhu Zaiyu, although Steven was not published before his death.

He has many opinions on architecture and public affairs, which are recorded in Materiae Politica e, burgerlike Stoffen( 1649) and Vita Politica. Het Burgherlick Leven and other books.