Note 180 — Chapter IV · MEXICAN HIEROGLYPHICS—MANUSCRIPTS—ARITHMETIC—CHRONOLOGY—ASTRONOMY
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The people of Java, according to Sir Stamford Raffles, regulated their markets, also, by a week of five days. They had, besides, our week of seven (History of Java (London, 1830), vol. i. pp. 531, 532.) The latter division of time, of general use throughout the East, is the oldest monument existing of astronomical science. See La Place, Exposition du Système du Monde (Paris, 1808), lib. 5, chap. 1.