000 tons, and was 5 stories high, presenting accommodation for 450 guests, none of whom were disturbed during the operation.
Tremont House, another hotel of a similar size, was also raised without accident.
The screws employed were about 2 feet long, 2 1/2 inches in diameter, with a pitch of half an inch.
They worked in cast-iron sockets, and were moved by handspikes: 1,450 such screws and 600,000 cubic feet of timber were used in raising the Briggs House.
A similar plan was adopted in July, 1868, at Boston, when whole streets of houses were raised in blocks of 6 houses together.
A spanner for the articles which socket upon the mandrel-screw.
The lever of a screw-press.
A form of key used with lock-faucets.
（Locksmithing.) This lock has various forms, and is used for hand-cuffs, fetters, manacles, and also as a padlock.
The essential feature is an opening bar, which is detained by a screw when in a locked po