The following numbers represent the words of the same message, in the numbered vocabulary: 48687, 54717, 4165, 1, 12185, 34162, 54078, 25393, 1, 18952, 11934, 6177, 48766, 21950, 1106, 48652, 51779, 46532, 34475, 22991, 28536, 4321, 40254, 49085, 22991, 1391, 48652, 39087, 3845, 41278, 49085, 28536, 54536, 28668, 45008, 31634, 25393, 48652, 27326, 19865, 42813, 28592. Here are 42 numbers, and 196 figures. To 196 add 42, the spaces required, and we have 238 impressions to make, to write the sentence thus represented. By calculation, we find there is required, in order to bring each numeral and space in its proper succession, to the vertical position, 1624 vibrations of the pendulum, which, at the rate of two to the second, gives the time required to transmit the message at 812 seconds, or nearly 13 minutes, being at the rate of 18⅓ letters per minute.[29] If, however, the vibrations of the pendulum are increased at the rate of 4 in a second, then the time required for the transmission of the message would be almost 7 minutes, and at the rate of 36⅔ letters per minute.[30] If it be increased to 6 vibrations per second, then the time would be 4½ minutes, and at the rate of 55 impressions per minute. [29] A day’s work of a fair compositor in setting up type is 6,000 ems, equivalent to 12,000 pieces, in ten hours, or 20 pieces per minute. A very quick and expert compositor may set up 10,000 in the same time, equal to 20,000 pieces, or 33⅓ pieces per minute. One em is equivalent to about two pieces. [30] The author has recently devised a new plan for printing with type, in which the pendulum movement is dispensed with, and the motion of the type wheel is dependent upon the control and government of certain apparatus at the transmitting station. This controlling part is capable of giving to the type wheel a most rapid movement, and from an estimate made from some actual tests, the number of letters capable of being printed, are increased much beyond the former plan, taking the message already used as an example. Still he considers it inferior to that mode, now adopted by Professor Morse. The modes of using the English letter for recording telegraphic messages are various, and they may be classed, as, First, Those which are rapid in transmission; expensive in construction, and complicated in machinery. Second, The less rapid in transmission; economical in construction, and simple in its machinery. Third, The slow in transmission; less expensive than the first class in construction; but complicated in its machinery.