http://oztypewriter.blogspot.jp/2014/03/electric-writing-ball-with-roof-on-top.html
To oz.Typewriter 御中
どの電動タイプの話だか、わかりますか? タイプバー式の電動1901-2年ごろ?
http://b.hatena.ne.jp/entry/babel.hathitrust.org/cgi/pt?id=mdp.39015010940248
The Journal of commercial education. v.18 1901-02 Sep-Feb.
This is doubtless because the old-
timer fails to allow for the elimination of the sounds of the spacing.
The electrical machine is far ahead of the operator in speed. When
the operator's time is correct it is not possible to jam this machine; it re-
sponds with marvelous quickness.
The Journal of commercial education. v.18 1901-02 Sep-Feb. - Full View | HathiTrust Digital Library | HathiTrust Digital Library