The vertical line 3-4 is rather stark and lonely, and so we' introduce two more verticals at 11-12 and 13-14, which modify this, and with another two lines in sympathy with 5-6 and leading the eye back to the horizontal top of the panel, some sort of unity is set up, the introduction of some masses completing the scheme at M. There is a quality of sympathy set up by certain line relationships about which it is important to say something.
"The Practice and Science Of Drawing"
Harold Speed
The verticals of these letters were originally five holes high.
"Edison, His Life and Inventions"
Frank Lewis Dyer and Thomas Commerford Martin
The verticals of the letters were perforated only four holes high, and the four rollers were arranged in pairs, one pair being slightly in advance of the other.
"Edison, His Life and Inventions"
Frank Lewis Dyer and Thomas Commerford Martin