The American Electro Magnetic Telegraph With the Reports of Congress, and a Description of All Telegraphs Known, Employing Electricity or Galvanism

These type were set up in a cavity, made by putting two pieces of long rules of brass plate together, side by side, with a strip of half their width between them; so as to make...

The above description is all that we have been able to obtain in relation to this plan of an electric telegraph and here introduce, figure 65, to illustrate it. The 30 needles a...

DEAR SIR—On my arrival here I received your letter, calling upon my recollection for what was said on the subject of an electric telegraph, during the passage from Havre, on boa...

The only mode in which it appears possible for him to have transmitted intelligence, seems to be this: a single divergence of the pith balls, succeeded by an interval of two or...

Mr. Saxton, however, was still further successful, the following year, in carrying out an idea which occurred to him on the 6th of December, 1832, of producing the same phenomen...

The index, _c_, figure 52, is insulated from the frame, N, being made of ivory. There is inserted in the ivory, a metal plate, containing the holes, to which is soldered a wire,...

Figure 59 represents a side view of the key arrangement. F is the platform. E the wooden support of the six keys. H is the larger spring, or key, secured to the support by screw...

We have now to notice a discovery, which forms the basis of those modern telegraphs in which the principle of electro magnetism is adopted. The following is an extract from the...

[2] The term _magnet_, here, is synonymously used with the iron for the magnet, as the simple iron is not a magnet, except when subjected to the action of the battery through th...

An accident has occurred, during the present winter, in the administration of the post office, to which the committee beg leave to call the attention of the House, as illustrati...

In the following table, the first column represents the keys, which when depressed, produce a deflection of the needles, (represented in the columns, second, third and fourth,)...

In the above figure, 23, let the right hand side represent Washington, and the left, Baltimore. The lines marked 1, 2, 3, 4, 5, and 6, between _m_ and _k_, respectively, represe...

B 52 to 36 W 11 “ 27 B 62 “ 38 W 13 “ 20 B 53 “ 44 W 7 “ 22 B 51 “ 35 W 12 “ 21 B 59 “ 45 W 14 to 19 B 49 “ 48 W 9 “ 24 B 56 “ 40 W 10 “ 23 B 58 “ 43 W 2 “ 13 B 63 “ 46 W 4 “ 14...

MY DEAR SIR: In my letter to you in answer to the circular respecting telegraphs, which you did me the honor to send me, I promised to advise you of the result of some experimen...

Before the session closed, I visited England and France, for the double purpose of submitting my invention to the test of European criticism, and to secure to myself some remune...

SIR: I have the honour to report that the experimental essay authorized by the act of Congress on March 3d, 1843, appropriating $30,000 for “testing” my “system of electro magne...

Underscores “_” before and after a word or phrase indicate _italics_ in the original text. Small capitals have been converted to SOLID capitals. Illustrations and footnotes have...

[13] It is proper that I should here state, that the patent-right is now jointly owned, in unequal shares, by myself, Prof. Gale of New York City University, and Messrs. Alfred...

I have as yet said nothing on the telegraph as a mighty aid to national defence. Its importance in this respect is so obvious, that I need not dilate. The importance generally t...

We then find, page 576, the following statement: “Ingenious as Prof. Wheatstone’s, contrivances are, they would have been of no avail for telegraphic purposes, without the inves...

The last diagram, as has been stated, exhibits the plan of the wire and ground, as used for telegraphic purposes, from its first operation, until the adjournment of Congress in...