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Let the weight on each of the masses be doubled, and the shafts doubled in area, then we shall have such arrangements as those at c, c2, c3; and if again the shafts and weight be doubled, we shall have d, d2, d3.
So our book has already become a large book which is surely something gained. What other indications have we as to the nature of this large book? The next sign is C2. What do you make of that, Watson?" "Hardly that, Watson. You will, I am sure, agree with me that if the page be given, the number of the chapter is immaterial.
I cannot doubt that, if we had the cipher, we should find that this communication is of the nature that I indicate." Again Holmes flattened out the paper upon his unused plate. I rose and, leaning over him, stared down at the curious inscription, which ran as follows: 534 C2 13 127 36 31 4 17 21 41 DOUGLAS 109 293 5 37 BIRLSTONE 26 BIRLSTONE 9 47 171 "What do you make of it, Holmes?"
When the finger-key is depressed, it raises the bar c8, which in turn trips the yoke-trigger c6 from under the cam-yoke c2, permitting the latter to fall, thereby lowering the cam c4 into peripheral engagement with the rubber roll, at the same time disengaging the cam from the stop-pin c7.
The vertical rods C, which actuate the escapements, are guided in the main frame, and each is urged downward by a spring c. Each rod C terminates directly over one end of a rising and falling yoke-bar c2, turning on a pivot c3 at the opposite end. Each of the yokes c2 is slotted vertically to admit an eccentric c4 turning on a pivot therein.
When the Sprengel pump had done its work, the reservoir R2 was further lowered and the mercury descended in R1 and filled R2, whereupon stopcock C2 was closed. The air adhering to the walls of R1 and that absorbed by the mercury was carried off, and to free the mercury of all air the reservoir R2 was for a long time worked up and down.
Now in B the length e f was only twice b c; but in C, e2 f2 will be found more than twice that of b2 c2. Therefore, the more slender the shaft, the greater may be the proportional excess of the abacus over its diameter. The smaller the scale of the building, the greater may be the excess of the abacus over the diameter of the shaft.
The U-shaped tube was provided with a stopcock C, and two ground connections g and g1 one for a small bulb b, usually containing caustic potash, and the other for the receiver r, to be exhausted. The reservoir R1 was connected by means of a rubber tube to a slightly larger reservoir R2, each of the two reservoirs being provided with a stopcock C1 and C2, respectively.
During this process some air, which would gather below stopcock C2, was expelled from R2 by lowering it far enough and opening the stopcock, closing the latter again before raising the reservoir. When all the air had been expelled from the mercury, and no air would gather in R2 when it was lowered, the caustic potash was resorted to.
All the records proved to be a shade flat by this standard, but were found to be almost exactly in accord with an instrument of fixed pitch, which in turn was found to be approximately eleven beats at variance with the pitch-pipe on c2.
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