London : Longman, Rees, Orme, Brown, Green, and Longman · leaf 450
the cock Z*, until the brassslip b c forms an obtuse angle of 120° with a c, a greater quantityof the steel bar is projected through the cock c (as shown in^g. 165.) ; and, on bringing the cock to e (as in j^^^. 166.), thewhole of the steel bar b c \s projected through r, and the twolines a b and a… … 165
Architecture
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