Imperially Commissioned Compendium of Essentials from the Complete Library of the Four Treasuries, Volume 10,881

original: "Qinding Siku Quanshu Huiyao" (欽定四庫全書薈要). The "Compendium of Essentials" was an elite, condensed version of the "Complete Library of the Four Treasuries." While the full library was distributed to several locations, this specific edition was produced for the Emperor's personal use in the Chizao Tang (Hall of Spreading Elegance).

Masters Section

original: "Zibu" (子部). This is one of the four traditional categories of Chinese literature. Scientific, technical, and mathematical works were classified under "Masters," alongside philosophy and medicine.

Imperially Produced Essence of Mathematical Sciences: Tables, Volume 5, Part 4

original: "Yuzhi Shuli Jingyun Biao" (御製數理精蘊表). This work, commissioned by the Kangxi Emperor, represents the pinnacle of 18th-century Chinese mathematics. It successfully integrated traditional Chinese methods with Western mathematical knowledge (like algebra and logarithms) brought to the court by Jesuit missionaries.

Logarithmic Tables, Part 4

original: "Duishu biao" (對數表). Logarithms were essential for the complex astronomical and surveying calculations required by the Qing state. These tables allowed scholars to perform multiplication and division through addition and subtraction, a major technological leap for the era.

The page is a traditional Chinese woodblock print layout with vertical columns known as moushu lines. The main title appears in the far right column, with specific volume and section titles following in subsequent columns to the left. An imperial library seal, reading "Seal of the Hall of Spreading Elegance" (Chizao Tang Bao), is stamped over the top of the grid lines, marking it as part of the Emperor's private collection.

Detailed Proofreading Official and Secretary, your servant Chen Mu.
original: "Xiangjiao Guan Zhushi Chen Chen Mu" (詳校官主事臣陳木). The "Secretary" (Zhushi) was a mid-level administrative rank. In the context of the Imperial Library, these officials were responsible for the extreme accuracy required in mathematical and astronomical texts. The use of "your servant" (Chen) was mandatory protocol when an official's name appeared in a work for the Emperor.

At the bottom center, there is a partial decorative semi-circular border containing the character "Mountain" (Shan), which was a standard structural element in Chinese bookbinding, often used to help the binder align the folded pages.