and I couldn't deliver tickers to get a supply of money, I gave a note.
When the notes were due, a messenger came around from the bank with the
note and a protest pinned to it for $1.25. Then I would go to New York
and get an advance, or pay the note if I had the money. This method of
giving notes for my accounts and having all notes protested I kept up
over two years, yet my credit was fine. Every store I traded with was
always glad to furnish goods, perhaps in amazed admiration of my system
of doing business, which was certainly new." After a while Edison got
a bookkeeper, whose vagaries made him look back with regret on the
earlier, primitive method. "The first three months I had him go over
the books to find out how much we had made. He reported $3000. I gave
a supper to some of my men to celebrate this, only to be told two days
afterward that he had made a mistake, and that we had lost $500; and
then a few days after that he came to me again and said he was all
mixed up, and now found that we had made over $7000." Edison changed
bookkeepers, but never thereafter counted anything real profit until he
had paid all his debts and had the profits in the bank.

The factory work at this time related chiefly to stock tickers,
principally the "Universal," of which at one time twelve hundred were
in use. Edison's connection with this particular device was very close
while it lasted. In a review of the ticker art, Mr. Callahan stated,
with rather grudging praise, that "a ticker at the present time (1901)
would be considered as impracticable and unsalable if it were not
provided with a unison device," and he goes on to remark: "The first
unison on stock tickers was one used on the Laws printer. [2] It was a
crude and unsatisfactory piece of mechanism and necessitated doubling
of the battery in order to bring it into action. It was short-lived. The
Edison unison comprised a lever with a free end travelling in a spiral
or worm on the type-wheel shaft until it met a pin at the end of the