The eighteen libraries reporting on this subject may be grouped under the following heads:

Eight of these libraries record statistics of reference use:

The following do not include reference use on their statistics sheets, although in some cases it is probably kept separately:

The Medical Society of the County of Kings and Oberlin College library make no record of reference use, but the latter records daily and monthly attendance.

Four libraries keep no record by class:

The following count the circulation on the day of issue: