at the distance from the 3 The .abutments ‘are center-of gravity to the j made of hard burned brick same point of attachment set in cement, and the of the string shall be triple voussoirs are arranged ac- the: distance from the cen- cording to the line of pres- ter of pressure to the same sure.… … soirs, so that when com- weight represents quite a pleted the crown sank 1°5 Fig.3. Grundriss nech ab (in Fig. 2) feeble tension,’ and one millimeters. The center- 1:135. which even quite a fine ing had to be arranged so cord could easily with- | I Hi _ as not to interfere with the stand.…
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