Ο

LIFE AND WORK

AT THE GREAT PYRAMID

DURING THE MONTHS OF JANUARY, FEBRUARY,

MARCH, AND APRIL, A.D. 1865;

WITH

A DISCUSSION OF THE FACTS ASCERTAINED.

BY C. PIAZZI SMYTH, F. R. SS. L. & E.

F.R.A.S., F.R.S.S.A.; HON. M. INST. ENGIN. SC., P.S. ED., AND R. A. A. S. MUNICH AND PALERMO;
PROFESSOR OF PRACTICAL ASTRONOMY IN THE UNIVERSITY OF EDINBurgh,
AND ASTRONOMER-ROYAL FOR SCOTLAND.

IN THREE VOLUMES;

WITH ILLUSTRATIONS ON STONE AND WOOD.

VOL. III.

EDINBURGH:

EDMONSTON AND DOUGLAS.

1877, Oct.31.

Walker fund.

CONTENTS OF VOLUME III.

DISCUSSION OF RESULTS.

DIVISION I.

LAWS OF PHENOMENA.

PAGE

3

10

13

19

PROPOSITION I.-The Base of the Great Pyramid is square?

PROPOSITION II.-The four sides of the Great Pyramid incline

towards its central vertical axis at equal angles?

PROPOSITION III.-The Angle of Inclination of the Sides of the

Great Pyramid is 51° 51′ 14.3" ?

PROPOSITION IV.—The Angle of Inclination of the Inclined
Passages in the Great Pyramid, is 26° 18′ 10′′ nearly?

PROPOSITION V.—The Great Pyramid is sensibly in the latitude

of 30° ? .

PROPOSITION VI.—Angular alterations in the Earth's crust have

been practically insensible during the existence of the

Great Pyramid?

PROPOSITION VIL-HYPSOMETRY OF THE GREAT PYRAMID,

Datum plane,

Present Vertical Height,

Ancient Vertical Height,

Floors of the Chambers,

Fresh-water Levels,

Sea-water Level,.

PROPOSITION VIII.-MATERIALS OF THE GREAT PYRAMID,

Composition of the Pyramid hill, .

Internal substance of Great Pyramid,

Exterior substance of Great Pyramid,

Salt inside Great Pyramid,

Mortar of Great Pyramid,

Diorite,

Granite,

PROPOSITION IX.-Orientation of the Great Pyramid,

DIVISION II.

Place of the King's Chamber in the Great Pyramid,

169

PAGE

Authority for Twenty-five Inches,

Authority for the number Twenty-five, .

DATE OF THE GREAT PYRAMID,

Whether the Great Pyramid is to be regarded as Astro-

232

236

240

246

251

260

261

263

The Pleiades and the Pyramid,

271

CHAPTER I.-MONUMENTAL DOCUMENTS STILL TO BE PROCURED,

303

An uninterpreted Sign,

310

CHAPTER II.-NAMES AND DATES OF THE BUILDERS,

CHAPTER IV.-EARLIEST PROVED POINT OF EGYPTIAN HISTORY,