THE COLUMBIA RUBBER WORKS CO.
American Luxfer Prism Co.,
|Chicago, September 21, 1897.|
1129 The Rookery, City.
In reply to your favor of September 20,
judging from the saving in our artificial light bills during the
past three months in our store, we estimate we will save the cost
of installation within twenty-two months.
Trusting that this information is what
you require, we remain,
|THE COLUMBIA RUBBER WORKS CO.,
R. T. Whelpley, Manager,
141 Lake st.