In presenting this plan of telegraph, we would not be understood to place it in competition with Prof. Morse's Electro-Magnetic Telegraph, which must go ahead of all other modes of telegraphic communication. But now that there is some excitement on the subject of telegraphs, and many villages situated within the distance of 20 or 30 miles from the main lines, and which would be glad to avail themselves of the advantages of early intelligence, but without much expense of capital, this plan is proposed as a convenient substitute. The communication by this plan is nearly as rapid as that by the magnetic, or about fifty alphabetic letter per minute; and the cost of constructing and putting in operation a line on this plan will not exceed five dollars per mile, whereas the other costs about $250 per mile. In the above scale, we have presented the various changes of the signals, and shall proceed to give an explanation of them: but the specification of the peculiar construction and mode of managing this telegraph will be deferred for the future-number.

EXPLANATION, &c.—It will be perceived that in the above scale of Telegraphic Signals, there are no two figures alike, but all are distinctly diverse, and have different significations. The several positions of each wing are numbered from one to eight; and by means of these combinations the various signals are effected. This scale is arranged in seven classes, the first of which consists of those which are composed of equal numbers, and of course appear the same from either direction. The significations are as follows: 1,1,Rest: 2,2,Answer: 3,3,Repeat: 4,4,Period: 5,5,Attention: 6,6,Resume: 7,7,Impeded: 8,8,Close. The second class consists of the combinations of 1 and 2 with higher numbers, and denotes the letters of the alphabet, thus: 1,2,A: 1,3,B: 1,4,C: 1,5,D: 1,6,E: 1,7,F: 1,8,G: 2,1,H: 3,1,I: 4,1,J: 5,1,K: 6,1,L: 7,1,M: 8,1,N: 2,3,O: 2,4,P: 2,5,Q: 2,6,R: 2,7,S: 2,8,T: 3,2,U: 4,2,V: 5,2,W: 6,2,X: 7,2,Y: 8,2,Z. The third class consists of the combinations of 3 with higher numbers, and denotes the numerical figures thus: 3,4,1: 3,5,2: 3,6,3: 3,7,4: 3,8,5: 4,3,6: 5,3,7: 6,3,8: 7,3,9: 8,3,0. The fourth class consists of the combinations of 4 with higher numbers, and signify eight commercial cities, thus: 4,5,Portland: 4,6,Boston: 4,7,New York: 4,8,Philadelphia: 8,4,Baltimore: 7,4,Washington: 6,4,Charleston: 5,4,New Orleans: The fifth class consists of the combinations of 5 with higher numbers, and signify six very frequently used words, thus: 5,6,Has: 5,7,Sailed: 5,8,For: 6,5,And: 7,5,Arrived: 8,5,From. The sixth class consists of the combinations of 6 with higher numbers, and signify four kinds of vessels, thus: 6,7,Ship: 6,8,Schooner: 7,6,Brig: 8,6,Sloop. The seventh and last class consists of the two combinations of 7 and 8, and signify (7,8,) abbreviation, and (8,7,) interrogation. By means of this classification, and regularity, this scale is very easily learned and each signal remembered. It has been ascertained by actual experiment that these telegraphs can be constructed and erected of sufficient size to be seen, distinctly 15 miles, and furnished with good glasses, &c., for 50 dollars each.

This telegraph has been proved by actual operation on a small scale, in the presence of many witnesses; and but for the introduction of a superior plan,—the electro-magnetic—would have come into general use. The use of it is offered free, for the present, to any who may be disposed to avail themselves.