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210 Seked, ratio in a pyramid, 37 see Pyramid. Setat, 33; see Measures of area. Sethe, complementary fractions, ; 7 on Peet's view of fractions, 10; view in regard to meret, 37. Sha'ty, unit of value, loi, 189. Shdmu, summer season, 44. Sirius, heliacal rising, 44; used to determine dates, 46. Smith, Edwin, papyrus, 2, 43. Sobhy, hînu determined from vases, 31 Sorites, series of unit fractions, 142, 146. Square root, approximate determination, 177. Sylvester, method of dividing 2 by odd numbers, 15.

Tables, division of 2 by odd numbers, 21; division of the numbers 1-9 by 10, 22; fractions of a hekat. Problems 47, 80, 81: 40; see 170, 182. Trapezium, 138, 187; see Trapezoid. Trapezoid, area, 36; see Areas. Triangle, area, 36; areas of sections, 94; see Areas; similar triangles, relation of sides, 37. Two-thirds, see Fractions.

Volume of a rectangular parallelepiped, 35; of a cylinder, 35, 159; method of determining the volume of a cylinder directly in khar, 88, 159; volume of a frustum of a pyramid, Golenischev papyrus, 178; of a frustum of a cone, 167 Wieleitner, on the Egyptian's interest in mathematics for its own sake, 43, 191. Writing, Egyptian, four forms, I; enigmatic writing, 118.

Year, Egyptian, the three seasons, epagomenal days, 43; "Wandering year," 44; Julian year, 44; siderial year, 45; Sirius year, 44-45; solar year, 45; equation for a star year, 45-46.