De vero telescopii inventore
Subtitle: cum brevi omnium conspiciliorum historia. Ubi de eorum confectione, ac usu, seu de effectibus agitur, novaque quaedam circa ea proponuntur. Accessit etiam centuria observationum microcospicarum
By: Authore Petro Borello, regis Christianissimi consiliario, & medico ordinario.
Contributors: Vlacq, Adriaan, 1600-1667 printer.; Meurs, Jacob van, 1619-1680, engraver.; Huygens, Christiaan, 1629-1695.
Publisher: ex typographia Adriani Vlacq
Published: 1655
Place of publication: Hagæ-Comitum [The Hague]
Language: lat
Number of pages: 67
Subjects: Jansen, Zacharias, -- 1588-1632; Lippershey, Hans; Telescopes -- Early works to 1800; Microscopes -- Early works to 1800; Optics -- Early works to 1800; Scientific apparatus and instruments -- Early works to 1800; Astronomy -- Early works to 1800; Saturn (Planet) -- Early works to 1800
Genres: Early works to 1800
Other titles: Observationum microcospicarum centuria.; Observationum microscopicarum centuria.; Liber secundus de conspiciliis.; De conspiciliis.; De Saturni luna observatio nova.
Notes: Woodcut portraits of Zacharias Jansen and Hans Lipperhey signed: "Berckman. J. v. Meurs sculp."

Signatures: ")?("² A-R⁴, A-F⁴.

"Liber secundus de conspiciliis" has drop-head title page and separate pagination sequence; register is continuous.

"Observationum microcospicarum [i.e. microscopicarum] centuria" has separate title page, dated 1656, separate pagination sequence, index and separate register.

Includes the first announcement of Huygens' discovery of the rings of Saturn, with pronouncement in form of an anagram at end of text: "Christiani Hugenii de Saturni luna observatio nona"--p. 62-63 [second sequence].

Digital reproduction of the copy at the Bavarian State Library, Munich, Germany, Signatur: 4 Math.a. 37 available at http://nbn-resolving.de/urn/resolver.pl?urn=urn:nbn:de:bvb:12-bsb00026354-7