Deflation
Deflation occurred periodically in the U.S. during the 19th century (the most important exception was during the Civil War). This deflation was at times caused by technological progress that created significant economic growth, but at other times it was triggered by financial crises — notably the Panic of 1837 which caused deflation through 1844, and the Panic of 1873 which triggered the Long Depression that lasted until 1879. These deflationary periods preceded the establishment of the U.S. Federal Reserve System and its active management of monetary matters. Episodes of deflation have been rare and brief since the Federal Reserve was created (a notable exception being the Great Depression) while U.S. economic progress has been unprecedented.
Long Depression
The sectors which experienced the most severe declines in output were manufacturing, construction, and railroads. The railroads had been a tremendous engine of growth in the years before the crisis, yielding a 50% increase in railroad mileage from 1867 to 1873. After absorbing as much as 20% of US capital investment in the years preceding the crash, this expansion came to a dramatic end in 1873; between 1873 and 1878, the total amount of railroad mileage in the United States barely increased at all.