Polytechnic Association Proceedings. 799 



arms project from an arbor, on one of which is fastened an iron 

 bell, weighing about twenty-five pounds, and the other has a knuckle- 

 joint and finger, that when it lets down, takes into the teeth of the 

 second wheel, and carries it forward, but passes the teeth freely 

 when brought back. The pendulum makes twenty-five beats, 

 and is about eighteen feet long. It has the regular striking train. 

 The lifting pins in the second wheel, the gathering pin on the third 

 arbor, and the locking bar and fly on the fourth. The mass of 

 cams, levers, star wheels, &c., that he manages to get in to give 

 the inside time, carry the snail, and do the unlocking, I will not 

 attempt to describe. It is so dark that we cannot see anything 

 without candles, nor find anything with. 



The chiming train is the same as the striking excepting that in 

 place of pins in the second wheel it has three pin wheels placed on 

 the arbor for operating the three levers; on this arbor is also placed 

 a cam with four slots, so divided that at the first quarter the train 

 runs long enough to strike two before an arm drops into one of 

 these slots and the train locks. At the next quarter it strikes four, 

 the next six, and the next eight. This completes the circuit, and it 

 commences anew. 



These levers are not operated in regular order, but always com- 

 mence with 1. Thus, at the first quarter it lifts 1, 2, the next 

 1, 2, 3, 2, the next 1, 2, 3, 2, 1, 2, and the last quarter, 1, 2, 3, 2, 1, 

 2,3,2. 



Above the main wheels the movement is contracted in width to 

 two feet, thus shortening all the arbors above to that length. The 

 main arbor bearings are two inches diameter, the scape wheel three- 

 quarters of an inch. I cannot think Mr. Rogers had a correct idea 

 of what he was going to do when he commenced it, for when put 

 up it would not run seven days, and he had to put in new maiij 

 wheels. The most stupendous blunder of all was puttmg it forty feet 

 above the dials, and the laugh comes in when he says that he wanted 

 to put it below the dials, but the architect would not let him, while 

 the architect declares he wanted to have it put below, but Mr. 

 Rogers would have it above. However, the clock was finally fin- 

 ished and an agreement made with the sexton's son that he should 

 have twenty-five cents every time it stopped, by giving information. 

 As it stopped nearly every day, and often three or four times, the boy 

 had a fat thing while it lasted; but it was soon put into other hands, 

 a new scape wheel put in, and other alterations made, so that it run 

 very well; but it had got a bad name, that clings to it even to this 



