Sample J73 from Directory of Continuing Numeric Data Projects. Washington: National Academy of Sciences. National Research Council, 1961. Pp. 14-21. 0010-2150 A part of the XML version of the Brown Corpus2,105 words 6 (0.3%) quotes 2 symbols 4 formulasJ73

Directory of Continuing Numeric Data Projects. Washington: National Academy of Sciences. National Research Council, 1961. Pp. 14-21. 0010-2150

Typographical Error: institute [for Institute] [2040]

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Organization : In this publication measurements of interfacial angles of crystals are used to classify and identify chemical substances . T. V. Barker , who developed the classification-angle system , was about to begin the systematic compilation of the index when he died in 1931 . The compilation work was undertaken by a number of interested crystallographers in the Department of Mineralogy of the University Museum at Oxford . Since 1948 the working headquarters has been the Department of Geology and Mineralogy . Numerous cooperating individuals in Great Britain , Holland , the United States , and Belgium have contributed editorially or by making calculations . Great interest and practical help have been given by the Barker Index Committee . Financial and material help have come from academic , governmental , and industrial organizations in England and Holland . Editors for Volumes 1 , and 2 , were M. W. Porter and the late R. C. Spiller , both of Oxford University . A third volume remains to be published . Substances : Volume 1 , deals with 2991 compounds belonging to the tetragonal , hexagonal and trigonal , and orthorhombic systems ; ; and Volume 2 , , with about 3500 monoclinic substances . Volume 3 , , in preparation , will treat the anorthic compounds described in Groth's Chemische Krystallographie . Properties : The Barker system is based on the use of the smallest number of interfacial angles necessary for indexing purposes . Other morphological , physical , and optical property values are also given . Sources of data : The index is essentially a new treatment of previously compiled morphological data . Most of the data used are from Groth's Chemische Krystallographie . Criticality : Every calculation has been made independently by two workers and checked by one of the editors . Use of nomenclature , symbols , units , physical constants : Accepted crystallographic symbolism has been used ; ; other symbols related to the index necessarily have been introduced . Currency : This publication covers the old literature ( Groth ) ; ; there is no mechanism for keeping the volumes up to date . Format : The publication form is that of clothbound books . The data are presented in lists and tables . Part 1 in both volumes is labeled `` Introduction And Tables '' . The tables include those for the classification angles , refractive indices , and melting points of the various types of crystals . Part 2 of Volume 1 , and Parts 2 and 3 of Volume 2 , contain the crystal descriptions . These are grouped into sections according to the crystal system , and within each section compounds are arranged in the same order as in Groth's Chemische Krystallographie . An alphabetical list of chemical and mineralogical names with reference numbers enables one to find a particular crystal description . References to the data sources are given in the crystal descriptions . Publication and distribution : The Barker index is published for the Barker Index Committee by W. Heffer & Sons , Ltd. , 4 Petty Cury , Cambridge , England . Volume 1 , containing Parts 1 and 2 was published in 1951 ; ; Volume 2 , , in three parts , in 1956 . The two volumes are available from the publisher for $16.80 and $28.00 , respectively .

2-2 . Crystal data organization : The present edition of crystal data was written by J.D.H. Donnay , the Johns Hopkins University , Baltimore , Md. ( Part 2 ) ) and Werner Nowacki , University of Berne , Switzerland ( Part 1 ) ) with the collaboration of Gabrielle Donnay , U. S. Geological Survey , Washington , D. C. . Many collaborators in the United States and Switzerland helped in collecting and assembling data , in making calculations , and in editing . Support came from academic and industrial groups in these two countries . The Geological Society of America gave a grant-in-aid to complete the work and bore the expenses of publication . Preparation of a second edition is in progress under the sponsorship of the Crystal Data Committee of the American Crystallographic Association . Coeditors are J.D.H. Donnay , G. E. Cox of Leeds University , and Olga Kennard of the National Council for Medical Research , London . Financial grants have been received from the National Science Foundation and the ( British ) Institute of Physics for the compilation work and the publication costs . The continuity of the project is suggested by plans for an eventual third edition . Substances : Elements , alloys , inorganic and organic compounds . ( Metal data will not be included in the second edition , since these have been collected independently by W. B. Pearson , National Research Council , Ottawa , and published as A handbook of lattice spacings and structures of metals and alloys by Pergamon Press . ) properties : Crystallographic data resulting mainly from X-ray and electron diffraction measurements are presented . Cell dimensions , number of formula units per cell , space group , and specific gravity are given for all substances . For some substances , auxiliary properties such as the melting point are given . Sources of data : Part 1 , of the present edition covers the literature to mid-1948 ; ; Part 2 , , up to the end of 1951 . Much of the material comes directly from secondary sources such as Strukturbericht . Criticality : The vast number of compounds to be covered , the limited resources to do the job , and the immediate need for this type of compilation precluded a thorough evaluation of all available data in the present edition . Future editions may be more critical . Use of nomenclature , symbols , units , physical constants : Since Parts 1 , and 2 , were prepared independently , the abbreviation schemes and the chemical symbols used differ in the two parts . The second edition should have greater uniformity . Currency : A second edition is in preparation , and there are long range plans for a third . Format : Data in the present edition are presented in tables and lists . Part 1 , deals with the classification of crystalline substances by space groups and is not a numerical data compilation . The compounds are divided according to composition into seven categories . Part 2 , contains determinative tables for the identification of crystalline substances . These are arranged according to crystal system . There are formula and name indexes covering both parts . References for Part 1 , are given at the end and for Part 2 , in the tables . Publication and distribution : The present edition of crystal data ( Af ) , published in 1954 as Memoir 60 of the Geological Society of America , is now out of print . The manuscript of the second edition will probably be ready by the end of 1960 .

2-3 . Crystal Structures organization : The author of Crystal Structures is Ralph W.G. Wyckoff , University of Arizona , Tucson , Arizona . The first section of this publication appeared in 1948 and the last supplement in 1960 . Though now complete , the publication is included in this directory because of its importance and because of the long-term nature of its preparation . Substances : Elements , inorganic and organic compounds ( no alloys ) . Properties : The data presented are derived almost entirely from X-ray diffraction measurements and include atomic coordinates , cell dimensions , and atomic and ionic radii . Sources of data : Published literature . Criticality : The aim was to state the results of all available determinations of atomic positions in crystals . Presumably the tabulated data are best available values . The critical comments in the textual sections of this publication are invaluable . Use of nomenclature , symbols , units , physical constants : The terminology used conforms to that of Internationale Tabellen Zur Bestimmung Von Kristallstrukturen . Currency : During the years of publication , supplement and replacement sheets were issued periodically . Coverage of the literature extends through 1954 and includes some 1955 references . It is to be hoped that some way will be found to keep this important work current . Format : The publication form is that of loose-leaf sheets ( Af ) contained in binders . The book is divided into chapters and in each chapter the material is grouped into Text , Tables , Illustrations , and Bibliography . Each group is paginated separately ; ; numbers sometimes followed by letters are used so that insertions can be made . Inorganic structures are found in Chapters 2 - 12 , organic structures in Chapters 13 - 15 . Within each chapter an effort has been made to group together those crystals with similar structures . There are three indexes , i.e. , an inorganic formula index , a mineralogical name index , and a name index to organic compounds . Publication and distribution : Publisher of Crystal Structures is Interscience Publishers , 250 Fifth Avenue , New York 1 , N. Y. . The work consists of four sections and 5 supplements . Price of the complete work including all necessary binders is $148.50 .

2-4 . Dana's System Of Mineralogy organization : Six editions of James Dwight Dana's System appeared between 1837 and 1892 . In 1915 Edward S. Dana , editor of the sixth edition , asked W. E. Ford of Yale University to prepare a seventh edition of his father's work . A number of people became involved in the preparation but work was slow until 1937 . In that year a grant was obtained from the Penrose Fund of the Geological Society of America to finance additional full-time workers . Money was also advanced by the publishers , John Wiley & Sons , Inc. . Volume 1 , was completed in 1941 and published in 1944 . The editors of this volume and Volume 2 , were the late Charles Palache , Clifford Frondel , and the late Harry Berman , all of Harvard University . Work on Volume 2 , was begun in 1941 , interrupted by the war in 1942 , and resumed in 1945 . The volume was completed in 1950 and published in 1951 . A supplementary grant from the Geological Society of America helped finance its publication . Besides the editors there were many contributors in the United States and Great Britain to Volumes 1 , and 2 . W. E. Ford , for example , continued to supply data on the occurrence of minerals until his death in 1939 . Volume 3 , is nearing completion and there are plans to revise Volume 1 . The project is currently supported by Harvard University . Substances : minerals . Properties : Crystallographic , physical , optical , and chemical properties . The crystallographic data given include interaxial angles and unit cell dimensions ; ; the physical property values include hardness , melting point , and specific gravity . Sources of data : Almost entirely original articles in journals ; ; abstracts and other compilations on rare occasions when original papers are not available . Criticality : All information is carefully appraised and uncertain facts are designated by ( '?' . ) An authentic diffraction pattern is always obtained and optical properties are frequently checked . Use of nomenclature , symbols , units , physical constants : Recommendations of international authorities , such as the International Union of Crystallography , are followed . There is a complete synonymy at the beginning of each species description . Currency : Currency in the usual sense cannot be maintained in an undertaking of this sort . Format : The data are presented in text and tables in bound volumes . Volume 1 , of the seventh edition contains an introduction and data for eight classes of minerals ; ; Volume 2 , contains data for forty-two classes . References are given at the end of each mineral description and a general index is given at the end of each volume . There will be a comprehensive index in Volume 3 , covering all three volumes . Publication and distribution : Volume 1 ( ( Af ) of the seventh edition of Dana's System Of Mineralogy was published in 1944 and Volume 2 ( ( Af ) in 1951 by John Wiley & Sons , Inc. , New York , N. Y. . ( The association of Wiley & Sons with the Dana Mineralogies dates back to 1844 when they published the second edition of the system . ) The two volumes are available from the publisher for $14.00 and $16.00 , respectively .

2-5 . The Groth Institute organization : `` The Groth Institute '' , which was established in 1958 , is a group activity affiliated with the Physics Department of The Pennsylvania State University , University Park , Pa. . Ray Pepinsky is the Director . The Institute derives its name from Paul Von Groth's Chemische Krystallographie , a five-volume work which appeared between 1906 and 1919 . The resident staff is large and consists of professional assistants , graduate students , abstractors , librarian , technical editor , machine operators , secretarial help , and others . There are also corresponding members and outside advisory groups . The Air Force Office of Scientific Research has provided financial assistance in the early stages of the Institute's program . Substances : All crystalline substances and other solid-state materials . Properties : The aim is to collect a very broad range of physical , chemical , morphological , and structural data for crystals on an encyclopedic scale and to seek all possible useful and revealing correlations of properties with internal structure . Sources of data : The first stage of operation has centered on the literature imaging of critical or summarizing tabulations such as the Barker Index . Coverage of primary literature will follow . Unpublished data will be available to the Groth institute from cooperating groups and individuals . Criticality : Critical evaluation of all data compiled is not a primary aim of this project . However , the proposed correlation of the many interrelated properties of crystals will reveal discrepancies in the recorded data and suggest areas for reinvestigation . In addition , the availability of computers will permit recalculation and refinement of much structural information . Use of nomenclature , symbols , units , physical constants : For punched-card or tape storage of information all literature values must be conformed to a common language . In this way a degree of unification of nomenclature , symbols , and units will be realized .