ENTRANCE LODGE. 



375 



and closes again after the carriage has passed through, without any apparent 

 The eiFect is produced by small plates let into the ground at short 



cause. 



distances from the gate, which when the carriage wheels roll over them 

 descend like a weighing-machine, and act upon certain levers concealed in a 

 trench underground. By means of these levers, a toothed wheel is made to 

 revolve, and to turn a toothed pinion affixed to the swinging post or axle of 

 the gate, and thus to throw it open or close it. Saul's Gate, fig. 224, is con- 



trived to enable the gate-keeper to open it without going out; and the use of 

 it is partly to enable old and infirm people to be appointed gate-keepers, as 

 an easy manner of providing for them ; and partly to avoid the risk often 

 incurred by children who are sent to open gates, being knocked down or 

 injured by the horses, or the wheels of the carriages. In fig. 224, g repre- 

 sents a horizontal shaft placed in a tunnel made across the road directly under 

 the gate, working at one end on the heel of the hanging post by a pinion at 

 h, and the other by a bevelled pinion at i, on the upright shaft k. This shaft 



BiilruHue Lodye, al C/tcQuers, Buckinghamshire. 



