H. L. Smith— Queen's Chamber in the Great Pyramid. 327 
Produce HV, it will meet H’’C” produced in C, in the are. 
EO'B [x11] ; join MC’; the angle C’MF’ will represent 4° 20’ 
north declination [XIv]. 
But the declination north, of 7 Tauri, the lucida of the Plei- 
ades is computed by the well-known astronomer Brunnow, to 
4° 13’ 46”. 
and hence the reason why the entrance passage was made to 
point to the lower rather than the upper culmination, the date 
of the pyramid erection being commencement of the grand 
Pleiades year. 
We will now proceed to construct the niche, having already 
the axis and the point O’. We assume also that the line C"H” 
marks out one side of the niche, though upon calculation it 
differs from it -12 inches, with our assumed data for height and 
breadth of the east wall. We set off A’H’, equal to 61-4 inches, 
as we find upon trial that 61°3, measured by Piazzi Smyth, 1s 
somewhat too small, yet this number, with slight change of 
breadth of the room, would do as well. The line 8’D will cut 
the corner of the niche very nearly in N” [xv]. 
Join N’K; it will cut C”H” in D’, corner of the niche ; b the 
computation D’/G = 31:86 inches [xv1], but as the line OD 
does not quite agree with the side of the niche (with our present 
data), we take 31-84 inches as the true height. From G, dra 
GX parallel to yG’; it will meet KS’ in X, a corner of the niche. 
If the point G was in the line OH”, we would have 52°5 in. 
for the breadth of this part of the niche; this would be perhaps 
‘oo great a strain on Piazzi Smyth’s measure, 52°83 Br. inches. 
Ti, however, we suppose the corner of the niche, G, to be ‘1 in. 
nearer the axis, this would give his measure exactly ; thus, for 
the half breadth; CB—(O”B+-1) or 77°5 in. —51°35 in, =26'15 
imeches. We nextcompute XX”, remembering, however, that the 
Ine GX” is -1 inch toward the axis; it is found to be 47°63 
ae ; adding to this ‘1 inch and also 51:25 in., the value of 
, is found to be 98°98 in., or practically 99 inches . eee ee 
One inch, The corner of the niche X is therefore 3° inches 
from the middle of the room, which gives us 215 inches for 
the half breadth of the niche at this place. 
The height of the fourth compartment is determined by the 
. B, through the point P, and is 
found ‘to be 28°18 inches, and at the same time the height of 
the upper com partment is determined to be 29°58 inches (XVII). 
The breadth of the fourth compartment, 322 inches, 1s deter- 
