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An Encyclopaedia of civil engineering : historical, theoretical and practical : illustrated by upwards of three thousend engravings on wood by R. Branston / by E. Cresy
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Chap. VIII.

BRITAIN.

377

There were two trenails to each stone; and it was found impossible, by ordinary means, topull them asunder, or lift the stones after their introduction.

M

Fig. 383

P1PTEENTH COURSE.

E

Fig. 384.

EIGHTEENTH COURSE.

 
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