Jacob Abbott's Rollo Books, such as Rollo at Work, Rollo at Play, Rollo in Europe, etc., are the best known of his writings, having as their chief characters a representative boy and his associates. The Rollo series is composed of the following volumes:
Rollo Learning to Talk.
Rollo Learning to Read.
Rollo at Work.
Rollo at Play.
Rollo at School.
Rollo's Vacation.
Rollo's Experiments.
Rollo's Museum.
Rollo's Travels.
Rollo's Correspondence.
Rollo's Philosophy--Water.
Rollo's Philosophy--Air.
Rollo's Philosophy--Fire.
Rollo's Philosophy--Sky.

Although this little work, and its fellow, "ROLLO AT PLAY," are intended principally as a means of entertainment for their little readers, it is hoped by the writer that they may aid in accomplishing some of the following useful purposes:--

1. In cultivating _the thinking powers_; as frequent occasions occur, in which the incidents of the narrative, and the conversations arising from them, are intended to awaken and engage the reasoning and reflective faculties of the little readers.

2. In promoting the progress of children _in reading_ and in knowledge of language; for the diction of the stories is intended to be often in advance of the natural language of the reader, and yet so used as to be explained by the connection.

3. In cultivating the _amiable and gentle qualities of the heart_. The scenes are laid in quiet and virtuous life, and the character and conduct described are generally--with the exception of some of the ordinary exhibitions of childish folly--character and conduct to be imitated; for it is generally better, in dealing with children, to allure them to what is right by agreeable pictures of it, than to attempt to drive them to it by repulsive delineations of what is wrong.