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Take one of the side stones of c2 out for a moment, as at d. Now the proper place of the cusp upon it varies with the weight which it bears or requires; but in practice this nicety is rarely observed; the place of the cusp is almost always determined by æsthetic considerations, and it is evident that the variations in its place may be infinite.
The reservoir R2 could be raised and lowered by a wheel and rack, and the range of its motion was so determined that when it was filled with mercury and the stopcock C2 closed, so as to form a Torricellian vacuum in it when raised, it could be lifted so high that the mercury in reservoir R1 would stand a little above stopcock C1; and when this stopcock was closed and the reservoir R2 descended, so as to form a Torricellian vacuum in reservoir R1, it could be lowered so far as to completely empty the latter, the mercury filling the reservoir R2 up to a little above stopcock C2.
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 "What do you make of it, Holmes?" "It is obviously an attempt to convey secret information."
In determining the keys in which to transcribe the various songs, the pitch-pipe used was that of the "International," which was adopted at the Vienna Congress in Nov. 1887. This congress established c2 = 522 double vibrations per second.
Therefore the weight of l and r, now represented by the masses l2, r2, is distributed over the whole of the capital. But the weight r was adequately supported by the projecting piece of the first capital h f c: much more is it now adequately supported by i h, f2 c2. Therefore, if the capital of B was safe, that of C is more than safe.
Let it become b2 c2 at C, which is a length representing about the diameter of a shaft containing half the substance of the shaft B, and, therefore, able to sustain not more than half the weight sustained by B. But the slope b d and depth d e remaining unchanged, we have the capital of C, which we are to load with only half the weight of l, m, n, r, i.e., with l and r alone.
The three contacts C1 C2 C3 must be the same distance apart as the centres of the link heads, and so situated as to lie on the arcs of circles described by the links. The binding post T3 is connected with the two outside contacts which may be flat-headed brass nails driven in almost flush with the top of the wooden base by wires lying in grooves under the base, and T4 with the central contact.
Now, as one piece is added to make a larger door, one piece is taken away to make a smaller one, or a window, and the masonry type of the Venetian Gothic window is consequently three-pieced, c2. § XVI. The reader knows already where a cusp is useful. It is wanted, he will remember, to give weight to those side stones, and draw them inwards against the thrust of the top stone.
Assuming that the recording and transcribing speeds of the machines were the same, this would place the original singing almost exactly in accord with the old "philosophical standard of pitch" which places c2 at 512 double vibrations per second.
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