Bought of STEPHEN BALLARD,
(Successor to Stearns & Ballard),
Manufacturer of Every Description of Leather Belting,
Also, Dealer in Vulcanized Rubber Belting, Hose and Packing, Belt Rivets,
Belt Hooks, etc.,
Extra Quality Lacing Leather,
No. 333 Pearl Street, Franklin Square (Harpers’ Building).
| 51 | ft. 24-inch Donb Belt | 692 | 352.91 | |
| 2 | lbs. Rivets | 80 | 1.60 | |
| 1 | „ Cement | 1.00 | ||
| 1 | Side Lacing | 5.00 | ||
| Cartage | .50 | |||
| 1 | Cask | 1.25 | ||
| Insurance | 4.15 | 366.52 | ||
| Collection 2¹⁄₂% | 9.16 | |||
| 375.68 |
I put this belt on quite loose. The bottom side was the tight one, and the upper side hung in a loop nearly three feet deep. This exhibited the uniform running of the engine in a striking manner. As is well known, variations of speed produce waves in such a loop, the height of which waves indicates the amount of these variations. This belt hung motionless. The most careful observations on the loop did not indicate that it was running at all. The engine had no fly-wheel; the belt drum, 10 feet in diameter, served this purpose also. This showed the value in this respect of high speed, 150 turns per minute. This absolute uniformity of motion surprised me, I knew nothing about the equalizing action of the reciprocating parts of the engine, to which this remarkable result was largely due. I was then absorbed in balancing, which was as far as I had advanced, and in this case, as previously in the governor, I “had builded better than I knew.”
The accompanying [diagrams] are from a duplicate of the Pooley engine built at the same time for a Mr. Adams, a paper-maker in the north of England. This engine was directly connected to the line of shaft. I was called home from Paris to go to Mr. Adams’ mill and start that engine. Mr. Adams’ mill was not yet connected, and I was obliged to return to Paris after taking friction diagrams, of which the following are examples.
ATMOSPHERE
SCALE, 16 LBS. TO 1 INCH
ATMOSPHERE
SCALE, 16 LBS. TO 1 INCH
Diagrams from Engine Built for Mr. Adams.
CHAPTER XIII
The French Exposition of 1867. Final Break with Mr. Whitworth.