CHARLES H. SLACK.
The American Luxfer Prism Co., Chicago, Ill.
|Chicago, December 7, 1897.|
Your product was installed in the transoms of
the front of my new store, Nos. 45, 47 and 49 Randolph street, last
spring, and, after an experience of six months, I consider it
My present store, which is just east of the
Masonic Temple, and on the alley corner, is 170 feet deep, but is in
every way much better lighted than my former place on the corner of
Wabash avenue and Madison street.
I consider that the savings in expense of
artificial light will pay the cost of the Prisms you have put in,
within two years.