Davis's manual of magnetism : including galvanism, magnetism, electro-magnetism, electro-dynamics, magneto-electricity, and thermo-electricity (1854)
Davis, Daniel · Boston : Palmer and Hall · leaf 214
h i - -I m n 0 - - P q r - - - s t — u w X - - y -- -- z Sf NUMERALS. 2 3 4 ----- 6 0 - It will be observed, that the characters are formedby different combinations of dots, and of short andlong lines, with short and long spaces. Betweeneach letter of a word, a short space is used, and longones… … usually employed. The electro-magnet near A, andthe lever, are the same as in the instrument lastdescribed; connected with them is an apparatus,moved by clock-work, for carrying the paper, whichis unwound from a large spool, S, by the rollersbetween which it passes, and thus drawn slowly overthe…
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