SUR L'ÉTABLISSEMENT DES ARCHES DE PONT. 813 
TABLE I. 
VALEURS APPROCHÉES DE = (Arches incomplètes, dites en arc de cercle.) 
Y 
J 
18,8706 20,6826 22,4913 26,1015 
|| 18,9327 20,7507 22,5654 26,1875 
18,9950 20,8189 22,6396 26,2736 
19,0573 20,8872 22,7139 26,3598 
191197 20,9357 22,7883 24,6183 26,4462 
191823 | 21,0243 22,8629 24,6989 26,5328 
19,2449 21,0929 22,9375 24,7796 26,6195 
19,3077| . 21,1617 23,0123 24,8604 26,7063 
| 19,3705 21,2306 23,0873 24,9414 26,7933 
| 19,4335 21,20996 23,164 25,0225 26,8804 
| 19,4966 21,3687 23,2376 25,1037 26,9677 
|| 19,5597 21,4380 23,3129 25,185: 27,0951 
19,6230 21,5074 23,3883 25,2666 27:1427 
19,6863 21,5768 23,4639 25,348 27,2304 
19,7498 21,6464 23,5396 25,4300 27,3183 
|| 19,877: 21,7859 23,6914 25,5939 27,4944 
19,9409 21,8558 23,7674 25,676: 27,5827 
20,0048 © | 21,9259 23,8436 25,7584 27,671 
20,0688 21,996 23,9199 25,8409 2717597 
——————— 
20,1329 22,0664| 23,9963 25,9235 27,8484 
20,1971 22,1368 24,0729 26,0062 27,9373 
20,2614 22,2073 241496 26,0891 28,0263 
20,3259 22,2779 24,2264 26,172: 
20,3g04 22,3486 24,3033 26,2552 
20,455: 22,4195 24,3804 26,3384 
20,5198 22,1905 24,4576 26,4218 
20,5847 22,5616 24,5349 : | 26,5054 
20,6496 ©” [ 22,6328 24,6123| 26,5891 28,5635 
20,7147 22,704 1 24,6899 26,6729 28,6536 
20,7798 22,7756 24,7676 26,7568 28,7438 
