The long dash is equal to six dots . The ordinary space between the elements of a letter is equal to one dot . The space between the letters of a word is equal to three dots . The space between two words is equal to six dots . The dot is an unfortunate appellation for this sign, because it conveys the idea of a point, or to speak electrically, a current of infinitely short duration.
Currents involve time in transmitting signals.
Clock-work requires time to run. Currents must be of sensible duration. The dot, therefore, involves time , but this time is variable, according to circumstances. The length of the dot should increase with the length of the circuit. In commencing, therefore, the habit should be acquired of making short, firm dashes , instead of light, quick dots .