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Cetian yueshuo 測天約說. [Jap-Sin II, 40.3; II, 50; II, 50 D]
AuthorSchreck, Johann Terrenz 鄧玉函, 1576-1630
Pub. Location---Publisher---
Daten.d.Phys. Desc.2 juan.
LocationARSICall NumberNOT HELD. DESCRIPTION ONLY
Full bibliographic citation see: Ad Dudink & Nicolas Standaert, Chinese Christian Texts Database (CCT-Database).

JapSin II, 40.3
Cetian yueshuo 測天約說.
By Deng Yuhan 鄧玉函 (Johann Terrenz [Schreck]); revised by Tang Ruowang 湯若望 (Johann Adam Schall von Bell).
Two juan (juan A is missing in our collection). One volume in bamboo paper. No date or place of publication.

There is a Latin inscription on the cover: “Modus quo fiunt eclipses | solis et lunae seu eas | observandi | pars 2 | a pp. Schall et Terrentio.” A note by Louis Van Hée on a separate paper reads: “Datur tantum 2um volumen operis cuius titulus est: Observantis caeli brevis tractatus.”
The verso of the title page bears the title of the collection: Xiyang xinfa lishu and of the section 西洋新法曆書,法原部, followed by the names of the chief compiler: Xu Guangqi 明禮部尚書兼翰林院學士協理詹事府事加俸一級徐光啟督修, the author: Terrenz 修政曆法極西耶穌會士鄧玉函撰, the reviser: Schall 湯若望訂, and the proofreaders: Zhou Yin, Wang Yinglin, and Chen Yingdeng 門人周胤,王應遴,陳應登受法. There are nine columns in each half folio, with twenty-one characters in each column; annotations are given in double lines and in smaller characters.
Pfister gives two different translations of the title. On page 157 (no. 5) he translates “Compendium des deux sphères, 2 vol.” and attributes the authorship of the book to Terrenz. On p. 180 (no. 21) he translates “Abrégé des observations et des mesures célestes, 2 vol.” and gives Schall as the author, which attribution is erroneous. Schall only revised the text; see also Jap-Sin II, 50 (a complete copy of this book).

Cf. Courant 4911; Väth, p. 369, no. 32.
Source: Albert Chan, S.J., Chinese Books and Documents in the Jesuit Archives in Rome, p. 337.

JapSin II, 50
Cetian yueshuo 測天約說.
By Deng Yuhan 鄧玉函 (Johann Terrenz [Schreck]).
Two juan. Bamboo paper with a paper case. No date or place of publication.

The cover bears a label with the title and a Latin inscription: “De Sphaera Tractatus | in duas partes diversus | a pe Joanne Terentio | pars 1a & 2a.”
This book is the same as Jap-Sin II, 40.3, but juan B is missing in the latter. In the Latin inscription of 40.3 the authorship is attributed to Terrenz and Schall. In our present book Terrenz is mentioned as the sole author, which seems to be more likely.
The title page bears four large characters: Xinfa lishu 新法曆書 (Calendar according to the new method). The verso of this folio gives the title of the book and the section it belongs to: 法原部 (the theoretical part). There follows a list with the names of the chief compiler (Xu Guangqi): 明體部尚書兼翰林院學士協理詹事府事加俸一級徐光啟修, the author (Terrenz) and the reviser (Schall): 修政曆法極西耶穌會士鄧玉函撰,湯若望訂 and the collaborators (Zhou Yin, Wang Yinglin, and Chen Yingdeng): 門人周胤,王應遴,陳應登受法.
The table of contents consists of three folios. There is an introductory note in one folio with someone’s romanization and notes written between the lines. Folio 1 of both juan A and juan B bears the title and the number of the juan. Each half folio consists of nine columns with twenty-two characters in the first column of each paragraph and twenty-one in the rest of the paragraph. The two juan are divided into eight chapters. Juan A consists of twenty-six and juan B of thirty-three folios.
In the introductory note Terrenz tries to show that cosmography is the foundation of calendar calculation. Unless one grasps the principles, the calculation may seem to be complicated and obscure. The treatise he has written is designed to make things more simple. It begins with evident and clear explanations, so that anyone can follow step by step and thus may come to learn this science.
According to Bernward H. Willeke (DMB 2:1282–1284, Terrenz), the Cetian yueshuo (Abridged theory of the measures of the sky) “was finished in 1628. The first part deals with static astronomy: of the equator and the horizon; the second with dynamic astronomy: with the ecliptic, orbit of the stars, daily motion, the sun, the moon, and the fixed stars. The manuscript was later revised and published by Schall. This work contains a full description of the telescope invented by Galileo as well as an account of the sun spots which at that time appeared as a new discovery though they had been known in China for over a millennium” (p. 1283).

Cf. Pfister, p. 157, no. 5; Feng 1938, p. 185; Hsü 1949, p. 369; Courant 4911; Couplet, p. 18; JWC 1:216–225.
Source: Albert Chan, S.J., Chinese Books and Documents in the Jesuit Archives in Rome, pp. 353-354.

JapSin II, 50 D
Cetian yueshuo 測天約說.
By Deng Yuhan 鄧玉函 (Johann Terrenz [Schreck]).
Two juan (juan B is missing). Bamboo paper with a paper case. No date or place of publication.

The cover bears a label with the title and a Latin inscription: “De Sphaera | tractatus. pars 1a | a p. Joe Terrentino | S.J.”
This book is exactly the same as Jap-Sin II, 40.3 and Jap-Sin II, 50. Together with Jap-Sin II, 40.3 (in which juan A is missing) it constitutes a complete set.
Source: Albert Chan, S.J., Chinese Books and Documents in the Jesuit Archives in Rome, p. 354.
Subject(s)Astronomy--China--History--17th century
Astronomy--China--History--Early works to 1800
Astronomy--China--Western influence
Eclipses--Calculation and prediction--China
Rec. TypeBook (stitch-bound 線裝本)LanguageChinese 中文
CollectionARSIRec. #14669