Istoria e dimostrazioni intorno alle maechie solari e loro accidenti comprese in tre lettere scritte all'illvstrissimo siguer Marco Velseri ...
Publisher: G. Mascardi; Culture et civilisation
Published: 1967
Place of publication: Roma; Bruxelles
Language: ita
Number of pages: 164
Subjects: Sunspots; Astronomy; Early works to 1800
Notes: Edited by Angelo de Filiis.

Includes four letters from Welser to Galilei.