Distribution of U.S. Library Holdings in WorldCat (1800-1923) #1838305 (License: Personal Use)

This histogram visualizes the frequency distribution of U.S. library holdings in WorldCat for titles published between 1800 and 1923, based on a dataset of 658,224 records. The median number of holdings per institution is 18, while the mean is 32.8, indicating a right-skewed distribution with a small number of libraries contributing disproportionately high counts (200+). The black bar at the bottom confirms the data represents U.S. holdings only.

Used in academic or library analytics reports to illustrate collection depth across institutions for early modern publications; supports research on bibliographic coverage, preservation gaps, or digital access planning.