The plan of the present investigation has been, therefore, to visit those libraries where large numbers of the books needed are located and thus, by combining the material secured in the different places, to approach as near as possible to completeness. One library fills out the gaps of another and it often happens that, in order to see the entire set of a magazine, it is necessary to visit three or four libraries. A record has been kept as to where the individual volumes are, but as useful as this information might be for those working in the same or in a kindred field it has been found too complex to be indicated in the list of magazines given in Part V.[15] The material here included is based on a personal examination of about three hundred volumes representing one hundred and twenty-eight different magazines. [Footnote 15: A list of the libraries consulted is given at the beginning of Part V.] In treating the German influence in the American magazines, it is important to consider the position which the magazine held during this early period. Difference in conditions enabled the periodical to play quite a different rôle from that which it now plays. In the eighteenth century, as compared with the present day, free libraries were scarce and readers had to depend largely on the books they could buy or borrow. Then, too, books were expensive, because many had to be imported from abroad, and those printed here could not be sold as cheaply as now. These conditions favored the magazines, which were inexpensive and furnished to their readers, besides original matter, republications of the best literature of Europe. They kept the public abreast with the times and supplied the place now occupied by the numerous libraries and books which can be purchased at a moderate cost.