No. LXXVIII.
A watch to go constantly, and yet needs no other winding from the first setting on the cord or chain, unless it be broken, requiring no other care from one than to be now and then consulted with, concerning the hour of the day or night; and if it be laid by a week together, it will not err much; but the oftener looked upon, the more exact it showeth the time of the day or night.
NOTE.
For a pocket watch it will be necessary to employ a small balance, with a nut attached to its axis and communicating with the fusee, the continued vibration of which will, by winding the watch, give it nearly all the advantages of a perpetual prime mover. Should the time-piece be placed in a fixed case it will require a communication between the joint of the door and the fusee, and this may likewise be readily applied to the case of a hunting watch.
Mr. Gout's pedometer not only marks the time, but the number of paces passed over from one place to another: this is accomplished by means of a chain or string passing to the leg of the wearer, or to the wheel of a chariot, which is made to advance the index hand one division at each elevation of the foot: thus, on the same dial, exhibiting, at one view, both time and distance. The same pedometer will, by a proper application to the saddle, ascertain every pace a horse takes, and it may be made to change its performance in a second, should the horse in the course of measuring go from one pace to another.