First edition folio with 17 tables and an atlas of 17 engraved plates. Eugene Spee (1843-1924) was appointed astronomer at the Observatory of Bruxelles [Brussels], where he was especially concerned with solar physics. This work is obviously on the solar spectrum. Item #1496
CONDITION & DETAILS: Folio. [xvii], 1, , 49, , 2, , 1. 17 tables and an atlas of 17 engraved plates. Tightly and solidly bound in half-calf over marbled paper boards. Very slight toning within. Two pages with tears. Handsome wide borders. Very good condition.