This paper argues the background of the Williamson Report from following viewpoints.
　1. The evolution of the American higher and professional education from late 19th century to early 20th century.
　2. The structure of library education in Melvil Dewey Period (1887-1923).

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　This paper deals with redundancy among the currently-used performance measures for public libraries, and with relations between each measure and in-library factors. The multivariate statistical analysis is adopted as a purposive approach, specifically factor analysis for reducing the redundancy and multiple regression analysis for determining the relation.
　On analyzing such data as are available from the nation-wide public library survey recently conducted by the author and from the library statistics annually compiled and published by JLA (Japan Library Association) the author finds out the followings: 1) four performance measures, each indicating a separate phase of public library activies, are, namely, proportion of the population registered in the service area, circulation per registered borrower, circulation per volume held, and profit per circulation (=an average unit cost of booksー total library expenditure/circulation); 2) more expenditure for the materials is generally needed to raise these measures; 3) having more than one library within a community is favorable for improving these measures; 4) public relations are considered to be effective for raising them, particularly the measure of proportion of the population registered in smaller libraries; 5) charging system and lending regulations also have some influence on them; and 6) number of journal titles purchased has more positive correlation with these measures than volumes held.
　The above findings will possibly be useful not only to suggest proper strategies for improving library services and activities, but also to categorize public libraries according to the factors identified to have relation to the measures.

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　The simulation model for automated library stacks is designed for computer simulation. It is intended to analyse circulation service, if automated retrieval system is induced to library stacks.
　Arrival rate of users and arrival numbers of users are input data of this model. The number of stacker cranes is variable parameter.
　Mean queue length of users, max queue length of users, mean waiting time of users, max waiting time of users and so on are output data of this model.
　The effectiveness and efficiency of automated retrieval system is estimated by these output data.

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