OF ARTS AND SCIENCES. 157 



Proceedinof now to obtain the sum of the diameters on the front, 



we have — 



4 columns, each 7.35 = 29.40 



2 „ „ 7.4725 = 14.945 



44.345 

 Leaving for the five inter- 

 columnar spaces . . 45.6925 



Breadth 90.0375 



K the front be divided into five columniations, each extending from 

 the centre of one column to the centre of the next, we have five seg- 

 ments and one diameter to compose the total breadth. 



Now, M. Blouet has given measures of four of the columniations on 

 the eastern front of the Temple ; so that, by adding to his measures 

 a single diameter, and subtracting the sum from the total breadth, the 

 remainder is the measure of the fifth segment. 



The two corner columniations appear to measure, according to Blouet, 

 respectively, 16.09 and 16.0575.* The two central columniations mea- 

 sured by him average 16.8961t 



The sum of tliese four columniations is 65.9397 



And if we add to this the diameter not included in the 



five segments 7.35 



We have left for the fifth columniation 16.7478 



90.0375 



The average of the two corner columniations, as measured, is 

 16.07375; and the average of the three central columniations is 

 16.84666. 



It seems not improbable that the calculated average of the 



2 corner columniations was 16.17 = 132' 



3 central „ „ 16.7825 = 137' 



* A doubt is occasioned by the fact, that, on the plate in the Expedition 

 scientifique, one of the central columniations is given at M. 4.960, and that this 

 measure differs so widely and abnormally from that of the other central, and 

 agrees so closely with that of the other corner columniation ; that I am led to 

 iuppose it to be the measure of a corner columniation transferred by oversight 

 to a wrong place on the plan. 



t Blouet gives only their joint measure. 



