This volume is the sixth in the County and City Data Book series. Its primary purpose is to provide for convenient reference a selection of recent statistical information for counties, cities, and other relatively small geographic areas. For each county, 161 statistical items are presented; for each incorporated city with 25,000 inhabitants or more, 163 items are presented. Items identical with those for counties are also presented for regions, divisions, States, and standard metropolitan statistical areas, except that for the last, the data on mineral industries and agriculture are omitted. Population and housing items identical (with minor exceptions) with those for incorporated cities are also presented for urbanized areas and unincorporated places.

Descriptive text and source notes are included to help the user better interpret the figures shown. The publications cited as sources usually contain additional statistical detail and a more complete discussion of definitions and concepts than can be presented here.

Selection of data.—In general, the items selected for inclusion in this volume are those for which the statistics

1. Represent the most generally useful individual summary measures;

2. Are available in comparable form for all counties or for all cities;

3. Offer potentialities for fruitful analysis when combined or compared with the other statistics selected.

The items selected represent the judgment of many individuals and organizations. Experience acquired in preparing and using the previous editions in the series also proved helpful.

Most of the statistics in this volume were obtained from the latest Censuses of Agriculture, Business, Governments, Housing, Manufactures, Mineral Industries, and Population. However, the book is not restricted to census sources. Also presented are recent data from other governmental and private agencies, among which are: Department of Agriculture, Board of Governors of the Federal Reserve System, Federal Home Loan Bank Board, Federal Power Commission, Public Health Service, Weather Bureau, American Hospital Association, and Governmental Affairs Institute.

Arrangement of tables. Although six tables and several appendixes are presented, two tables form the basic framework of this volume: The county table (table 2), which presents 161 items of information for each county; and the city table (table 6), which presents 163 items for each city having 25,000 inhabitants or more in 1960. (See "Column Headings," pp. IV-VIII.)

To simplify finding of statistics and comparisons among areas, each table shows as much as possible of the same kind of information as each other table, in as nearly the same sequence as possible. The differences in content among tables 1 and 2 (which present identical items), table 3 (which is identical with tables 1 and 2 except for the omission of mineral industry and agriculture data), tables 4 and 5 (which are restricted to population and housing data), and table 6 are primarily due to the nonavailability or nonapplicability of some of the data for some of the types of areas covered. For example, data for presidential vote cast are available for counties, but not for urbanized areas or

cities. A few differences in content reflect the greater importance of particular items for one type of area as against others.

Each item is identified by a number. Items in tables 1, 2, and 3 are numbered 1 to 161. Those in tables 4 and 5 are numbered 201 to 267. Those in table 6 are numbered 301 to 463. The numbers are used not only as a finding device but to identify the applicable portions of the text material appearing under "Source Notes and Explanations."

Appendixes. A number of appendixes are included to expand or explain the coverage of the tables.

Appendix A is in two parts. Part 1 presents the population of the cities shown in the city table (table 6) with the cities arranged according to rank order of population. Part 2 provides a complete list of all urban places identified in the 1960 Census of Population, arranged alphabetically by State, and shows their population and county in which located.

Appendix B presents a classification of the units presented as "counties" in table 2 by their official government status. In order to include all of the first-level subdivisions of States, the "county" table includes a number of "independent cities," "Federal areas," "city-counties," and other special cases. These are included also, where appropriate, in the city table.

Appendix C is included because some of the cities in the city table do not have weather stations. To present climatological data for such cities, nearby stations having similar weather conditions were substituted. Appendix C lists cities for which substitutions were made and identifies the weather station substituted.

Appendix D presents a list of the standard metropolitan statistical areas (see "Geographic Concepts and Codes," p. XI, together with their constituent counties and independent cities; or in the case of New England SMSA's, towns and cities.

Maps. A map for each State appears in the final section of this volume. Each map shows the names and boundaries of all counties and standard metropolitan statistical areas, and the name and location of each city having 25,000 inhabitants or more.

Three maps appear in the front part of the volume for the United States as a whole. The first shows boundaries of geographic regions, divisions, and States; the second, the name and location of all standard metropolitan statistical areas; and the third, the name and location of all urbanized areas.

Availability of punchcards and computer tapes.-During the preparation of the Data Book, the statistics presented for tables 2 to 6 were placed on standard IBM 80-column punchcards. The items included on the punchcards are arranged in 10 major subject matter groups for all counties, 8 major groups for all standard metropolitan statistical areas, 4 major groups for urbanized areas and unincorporated urban places, and 10 major groups for cities, each group corresponding to the headings for one page as shown in the published tables. The data contained in each subject matter group are punched into 2 cards and follow the identical sequence of the column headings shown here (see pp. IV-VIII) for each of the tables. Thus the data for all subjects are spread

over a total of 20 cards for any one county or city, 16 cards for any one standard metropolitan statistical area, and 8 cards for any one urbanized area or unincorporated urban place.

These cards are available on a cost-of-reproduction basis. The estimated cost of a reproduction of the entire set (approximately 82,000 cards) is $850 plus shipping costs. However, it is not necessary to purchase the entire set. Selections can be made of particular items or of specified areas with a proportionate reduction in cost, or various items can be combined into one or more cards at cost.

The preparation of a computer tape file containing all or part of the data presented on the punchcards and in the Data Book can also be arranged.

For more information concerning cost of punchcards or computer tapes, compatibility of tapes with various computers, or other such matters, write to: Chief, Statistical Reports Division, Bureau of the Census, Washington 25, D.C.

Relationship to other Abstract publications. The annual Statistical Abstract of the United States is, of necessity, limited primarily to the presentation of current data for the country as a whole. To a much lesser extent, it presents data for regions, divisions, and States and for historical series. The supplements to the annual Abstract have broadened its scope both geographically and historically.

In addition to the County and City Data Book, another smallarea supplement, Congressional District Data Book, the first of

a new series, presents for all 437 congressional districts as constituted in 1960 a summary of data from the most recent censuses. A second edition of the Congressional District Data Book relating to districts as constituted in 1962 is now in the planning stage and tentatively scheduled for issuance in 1963.

The historical supplement currently in circulation is Historical Statistics of the United States, Colonial Times to 1957. This is a completely revised and expanded version of Historical Statistics of the United States, 1789-1945, issued in 1949. Compiled by the Bureau of the Census with the cooperation of the Social Science Research Council, the new volume presents historical data on every major aspect of the Nation's social and economic development.

Responsibility. The contents of this volume are taken from a number of sources, as indicated under "Source Notes and Explanations." The Bureau of the Census cannot accept the responsibility for the accuracy or limitations of the data presented here, other than for those which it collects. The responsibility for selection of the material and for proper presentation, however, rests with the Bureau.

Comment and criticism.-In the planning of revisions of a standard volume, the compiling agency finds it particularly help ful to receive the reactions of the users of each edition. To this end, users of this volume are encouraged to send in their suggestions, comments, and criticisms.

Annual Volume Statistical Abstract of the United States. Since 1878, the authoritative summary of statistics on the social, political, and economic organization of the United States. Includes a representative selection of statistics widely used by public officials, businessmen, educators, librarians, research workers, and students. 1962 issue now available. 1,045 pages, 43 maps and charts. Price $3.50 (Clothbound).

Historical Supplement

Historical Statistics of the United States, Colonial Times to 1957. Prepared with the cooperation of the Social Science Research Council. A compilation of more than 8,000 statistical time series, largely annual, on American social and economic development covering periods from 1610 to 1957. Includes definitions of terms and descriptive text. Specific source notes provide a basic guide to original published sources for further reference and additional data. Detailed alphabetical index. 801 pages. Issued 1960. Price $6.00 (Clothbound).

Small-Area Supplements

County and City Data Book, 1956. A compact presentation of 133 items of statistical data for each county in the United States, and 130 items for each of 484 cities having 25,000 or more inhabitants in 1950. Information comparable to that for counties is also presented for geographic regions, divisions, States, and standard metropolitan areas. Items included based largely on results of 1954 Censuses of Agriculture, Business, and Manufactures. Includes 51 maps, explanatory text, and source notes. Issued 1957. Price $4.50 (Clothbound). Congressional District Data Book (Districts of the 87th Congress). A handy reference consisting of 135 statistical items for all 437 congressional districts as constituted in 1960; 72 items pertaining to nonwhite population for selected districts; and 125 items for the 297 districts whose boundaries follow county lines. Based largely on results of the most recent cenIncludes text and source notes. 176 pages. Out of

suses.

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