670 



PROF. G. P. SMYTH ON THE REPUTED METROLOGICAL SYSTEM 



nearest inch ;" but because an error of more than an inch may be suspected in 

 measuring the lower side, or that lying flat on the rock. 



Fig. 2. 





Feet. 



Inches. 



Its lower side being 



8 



3 



„ upper . , . . 

 „ vertical . . . . 



4 

 4 



3 

 11 



„ inclined . . . . 



6 



3 



This suspicion arises, from the circumstance of the lower left-hand corner in 

 the section, which should be a right angle, coming out in the computation more 

 than one degree and a half different therefrom ; an amount of error in their 

 easiest angle, which the builders were not likely to commit, when they had 

 arrived within 1 or 2 minutes only, of what was required of them in their most 

 difficult angle. We have therefore as follows, from that unique opportunity of 

 the casing stones, which has now passed away for ever ; as the stones are since 

 reported to have been irretrievably injured by the hammers of specimen seekers, 

 and the mischief-working of curiosity-mongers. 



By angle direct 



By vertical and inclined sides 



Mean 



By angle direct 



By vertical and inclined sides 



By three measured sides 



Mean 



By angle direct 

 By vertical and inclined sides 

 By three sides 



By two sides, and base | 

 shortened by one inch 1 j 



Mean 



51 



50 



U 



51 



52 



303 



51 



51 



15-2 



51 



50 







51 



52 



30-3 



61 



50 



46-5 



51 



51 



5-6 



o 



51 



50 







51 



52 



30-3 



51 



50 



46-5 



61 



52 



12-2 



51 



51 



22-2 



