

VIEW SHOWING TRESTLES FOR BOULE GATES AT THE LIBSCHITZ DAM, BOHEMIA, TAKEN DURING CONSTRUCTION. 

 The trestles are 4 feet i inch apart and 19.7 feet high, weighing, with floors and all attachments, 3740 Ibs. 



each. The clamp for the operating chain is seen on the top member (see p. 270). 



{To face p. 246.) 



