The Civil engineer and architect's journal, scientific and railway gazette . 1. Experiment 2.—11 stock bricks, cemented together with 1 sandand 1 roman cement, broke down with 7 lb. placed on the end. Experiment 3.—38 bricks, cemented with neat, patent portlandcement, broke down with 141b. placed on the end. Experiment 4.—30 bricks, cemented together with 1 portlandcement and 1 sand, broke down with 15 lb. at end. Experiment 5.—22 bricks cemented together with 1 portlandcement and 2 sand, broke down with 168 lb. at end. Experiment 6.—25 bricks, with 1 portland cement and 4 sand,broke down with
The Civil engineer and architect's journal, scientific and railway gazette . 1. Experiment 2.—11 stock bricks, cemented together with 1 sandand 1 roman cement, broke down with 7 lb. placed on the end. Experiment 3.—38 bricks, cemented with neat, patent portlandcement, broke down with 141b. placed on the end. Experiment 4.—30 bricks, cemented together with 1 portlandcement and 1 sand, broke down with 15 lb. at end. Experiment 5.—22 bricks cemented together with 1 portlandcement and 2 sand, broke down with 168 lb. at end. Experiment 6.—25 bricks, with 1 portland cement and 4 sand,broke down with 56 lb. at end. 1846.] THE CIVIL ENGINEER AND ARCHITECTS JOURNAL. 295 Experiment 7.—26 bricks, with 1 portland cement and 5 sand,broke down with 74. lb. at end. Experimnt 8.—14 bricks, all portland cement, with a wheel of9 cwt. in the centre, broke down witli 17 lb. at end. Experiment 9.—16 bricks, cemented together with 1 portlandcement and 1 sand, and suspended at both ends, broke down with15 cwt. placed in a scale suspended on the centre. {See fig. 2).. Fig. 2. Experiment 10.—A block of portland stone, 2 ft. 11 in. long,and 9 by 9 inclies, broke with a weight of 38 cwt. {See fig. 3.)ffote.—A block, cemented with roman cemeot, would not bear theweight of the stone, iu a similar position.
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