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proper names occur which are not found in the vocabulary, or 

 which cannot be formed out of any words in it, they mufl be 

 expreffed by their conftituent letters, and admit of no abridge- 

 ment. If fecrecy be required, any preconcerted alteration of the 

 arrangement of the words in the vocabulary will render the figns 

 uniAtclligible to all except thefe who may be in pcflefllon of 

 the key. 



After a fentence fliall be reduced into fymbols or figns, the 

 next confideration is to convey them expeditioufly to a great 

 diftance by a fimple and certain method. Light feems to be the 

 moft proper inflrument for this purpofe, and may be applied in 

 the following manner : 



Let the fpace through which the intelligence is to be tranf- 

 mitted be divided into flations, and at each of them let three 

 lights be placed at confiderable diftances from each other, fo as 

 to be diftinguifhable from the two next pofts or ftations : let there 

 be a method provided of obfcuring any of them at pleafure. 



At each ftation there is to be a perfon appointed to look out 

 for fignals at a certain hour ; the figaal requiring attention may 

 be the exhibition of the three lights, and the fame may be alfo 

 the fignal of rcadinefs to receive the communication : thefe three 

 lights are intended to reprefent the three places of the fymbolical 



letters 



