The resources of the library upon each of the subjects presented can be made known in many ways familiar to the librarian, such as posted lists, bulletins, and by the mention of them in the talks.
Upon a night which the librarian might consider of interest to them, special invitations may be sent to the different organized societies of working people, such as the retail clerks, labor unions, etc, who might not include themselves readily in a general published invitation.
It has been generally observed that more people are willing to read than know _what_ to read, and are always glad of help in selection.
The originality of the librarian will develop many themes and schemes, and the work itself will doubtless show new veins which may be followed up.

It may be that not many will avail themselves of any one invitation, but with a constant change of topic and manner of presentation, there cannot fail to be a great number, eventually, whose attention will be enlisted..