. Life and work at the Great Pyramid during the months of January, February, March, and April, 1865 : with a discussion of the facts ascertained . n-happy piece of rock-course has been visible to men. 3cZ, The portions of standing rock thus employedto make up the interior substance of the Pyramid,though cut square and level on the upper surface oftheir terraces, are by no means also cut in everycase coincidentally with the surfaces of the abuttingcourses of masonry; and as the rock addition isonly partial and accidental, while the masonrycourses are structural and extend unbroken around,a
. Life and work at the Great Pyramid during the months of January, February, March, and April, 1865 : with a discussion of the facts ascertained . n-happy piece of rock-course has been visible to men. 3cZ, The portions of standing rock thus employedto make up the interior substance of the Pyramid,though cut square and level on the upper surface oftheir terraces, are by no means also cut in everycase coincidentally with the surfaces of the abuttingcourses of masonry; and as the rock addition isonly partial and accidental, while the masonrycourses are structural and extend unbroken around,and as we believe through, the entire Pyramid,—we cannot allow the enumeration of the latter, to beinterfered with by a casual and local feature of theformer. Many of the data of these conclusions arerendered in the Photographs described in Section vol. ii.; and their general testimony is pictoriallyrepresented in Plate iii., which gives a diagonalsectional view of the north-east corner of the Pyra-mid, and shows the subservience of the rock to themasonry courses, at that point. Hence we trust there is no real error in represent- Vol . Ill. W H W- F^TknvLilV Edm PROP. VII.] HYPSOMETRICAL DATA ? 67 ing the courses between the pavement below, andthe present ( 1865) platform at the top of thePyramid, as 202 ; even by the French measures, andMr. Lanes also. And we then have, for the verticalheight between these two places, the following re-sults of different authorities :— Measurers. Date Mode ofMeasure. Reference. BritishInches. MM. Jomard and Cecile, . 1800 Steps, Vol, ii. Sect. v. 5433 MM. Le P^re and Coutelle, 1801 Steps, Vol. ii. Sect. v. 5435 M. Nouet, 1800 f Trigono-)( metry, f Vol. ii. Sect. v. 5443 Colonel Howard Vyse, 1837 Unknown, His own work. 5409 Mr. Lane, 1843 Unknown, ( Mrs. Poole\ (5472-40.)i Alexandrian 5432 Mahmoud Bey, 1862 Barometer, \ Pamphlet( of 1865. 5445 C. Piazzi Smyth (April), . 1865 Steps, Vol. ii. p. 131. 5445 Messrs. Aiton and Inglis,
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