Sijing (Chinese: 四鏡) "Four Lenses"; article in the Huashu with the earliest known reference to the basic types of simple lenses
Geng Xin 庚辛 "The Geng and Xin Families" (5.10) recounts how two neighbors, figuratively named after the 7th and 8th Celestial stems, used different materials to construct fish ponds.
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The English title of the Huashu is usually "Book of Transformations" or "Book of Transformation", but it is also translated "Book of Alternations" (Moeller 2004:151) and "Scripture of Changes" — not to be confused with the Yijing" (Lembert and Schenkel 2002:213). "Book of Transformations" is used in titles of books about the Yijing (Anagarika Govinda 1981) and magic (Marian Green 2001), and "Book of Transformation" in one by the Dalai Lama (2001).
Huashu |