The Koch Patent File, for preserving newspapers, magazines, and pamphlets, has been recently improved and price reduced. Subscribers to the SCIENTIFIC AMERICAN and SCIENTIFIC AMERICAN SUPPLEMENT can be supplied for the low price of $1.50 by mail, or $1.25 at the office of this paper. Heavy board sides; inscription "SCIENTIFIC AMERICAN," in gilt. Necessary for every one who wishes to preserve the paper.
Address
MUNN & CO.,
Publishers SCIENTIFIC AMERICAN.
To appear end of February,
The United States
BUSINESS DIRECTORY
FOR 1877.
This Directory contains over 400,000 names of persons in all kinds of business. Arranged alphabetically according to States, and classified according to business. It is a valuable aid to the Merchant, Manufacturer, and Mechanic, for correspondence or the distribution of circulars. The edition of 1877 is the third year of issue, and has already received a largely increased patronage from the business public.