His "Weekly Chronicles" spanned forty years (they have since been reprinted in twenty volumes) and helped prepare the ground for the 20th-century blossoming of Polish science and especially mathematics.
Cronicile sale saptamanale au durat patruzeci de ani (de atunci au fost retiparite in 20 de volume) si au contribuit la pregatirea terenului pentru expansiunea stiintei poloneze, in special a matematicii.