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Book/Printed Material Works of Galileo Galilei, Part 3, Volume 15, Astronomy: The Assayer. Il Saggiatore

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About this Item

Title

  • Works of Galileo Galilei, Part 3, Volume 15, Astronomy: The Assayer.

Other Title

  • Il Saggiatore

Summary

  • Il saggiatore (The assayer) by Galileo Galilei (1564--1642) is the final and most significant work in the polemic regarding the characteristics of comets involving the Italian scientist and mathematician in the years 1618--23. Three comets appeared in the skies over Europe in 1618, giving rise to a debate about the nature of these celestial bodies. In 1619 Jesuit priest Orazio Grassi published a pseudonymous treatise on the comets. Grassi's interpretation was then criticized in Discorso delle comete (Discourse on comets), a work published by Mario Guiducci but attributed to Galileo. Il saggiatore is addressed to Virginio Cesarini, a young man who had heard Galileo lecture in Rome. Taking Grassi's polemic on the nature of celestial bodies as a point of departure, Galileo set forth a general scientific approach to the investigation of celestial phenomena, thereby making an indirect defense of the Copernican, heliocentric, theory against the Ptolemaic, geocentric, system. Galileo argued that the book of nature was written in mathematical terms and so could only be deciphered by those who knew mathematics. Il saggiatore was published in Rome in 1623 under the auspices of the Lincean Academy, and dedicated to Pope Urban VIII. The Roman edition was entrusted to Tommaso Stigliani, who did a poor job resulting in numerous typographical errors. All of the copies of the first edition of Il saggiatore thus bear corrections needed to give the text of Galileo's original meaning. This copy shows marginal notes in Galileo's own hand.

Names

  • Galilei, Galileo, 1564-1642 Author.

Created / Published

  • Rome : Giacomo Mascardi, 1623.

Headings

  • -  Italy
  • -  1618 to 1623
  • -  Celestial bodies
  • -  Comets
  • -  Galilei, Galileo, 1564-1642
  • -  Heliocentric astronomy
  • -  Solar system

Notes

  • -  Title devised, in English, by Library staff.
  • -  Original resource at: National Central Library of Florence.
  • -  Content in Italian.
  • -  Description based on data extracted from World Digital Library, which may be extracted from partner institutions.

Medium

  • 1 online resource.

Source Collection

  • Galilean Collection

Digital Id

Library of Congress Control Number

  • 2021666740

Online Format

  • compressed data
  • pdf
  • image

Additional Metadata Formats

IIIF Presentation Manifest

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Credit Line: [Original Source citation], World Digital Library

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Cite This Item

Citations are generated automatically from bibliographic data as a convenience, and may not be complete or accurate.

Chicago citation style:

Galilei, Galileo, Author. Works of Galileo Galilei, Part 3, Volume 15, Astronomy: The Assayer. Rome: Giacomo Mascardi, 1623. Pdf. https://www.loc.gov/item/2021666740/.

APA citation style:

Galilei, G. (1623) Works of Galileo Galilei, Part 3, Volume 15, Astronomy: The Assayer. Rome: Giacomo Mascardi. [Pdf] Retrieved from the Library of Congress, https://www.loc.gov/item/2021666740/.

MLA citation style:

Galilei, Galileo, Author. Works of Galileo Galilei, Part 3, Volume 15, Astronomy: The Assayer. Rome: Giacomo Mascardi, 1623. Pdf. Retrieved from the Library of Congress, <www.loc.gov/item/2021666740/>.