SC8 On tlie Establishment of Telegraphs 



tic niat of which will contain a certain number of sections, 

 con;posed of thirty places each, whilst the second will con- 

 tain a number of sections, consisting of nine hundred places 

 each, observing only, that the number of sections in both 

 parts added together must not exceed ten : then, instead of 

 filling up the blanks in the manner before proposed, a cer- 

 tain number of them must denote, that " The ensuing sig- 

 nal must he read in such a section of part first " whilst the 

 remaining blanks will signify, that " The two ensuing sig- 

 ,nals must be read in such a section of part second,'"' specifying 

 the particular sections of each ; and according to the man- 

 ner in which the two parts are divided, will be had a code of 

 signals more or less extensive, as is shown in the following 

 table, by which it will appear, that if the method used in the 

 second part is carried to its utmost extent, by filling up all 

 the blanks in that manner, a signal-book may be formed 

 containing 9000 words and sentences, that may be repre- 

 sented by three changes on the telegraph, retaining still the 

 power of using the alphabetical mode when necessary, as 

 before : and that number is more than can ever be cilhec 

 useful or necessary in practice, but it might be increased on 

 the same principle io an almost unlimited extent. 



•2 



3 " 3 •> 

 ^ c ■" — 





~ ^ .r V 



C 3 



Total No 

 of words 

 and sen- 

 tences lliaf 

 may be 

 written in 

 the signal- 

 book. 



30 

 30 



do. 

 do. 

 do. 

 do. 



do. 



270 



£40 



210 



]&0 



150 



120 



5)0 



60 



30 



900 



1800 

 2700 

 3600 

 4500 

 5400 

 6300 

 7200 

 8100 

 9000 



1170 

 2040 

 2910 

 .S780 

 4650 

 5520 

 6390 

 7260 

 8130 

 9000 



For 



