Chemical Literature, Volume 7, Number 3, Fall 1955 Page: 4
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lished by the center. The rules used for encoding are briefly described.
The center has made a statistical analysis of the coded chemicals, and a
discussion is presented on the frequency of 'occurrence of the various structural
features of these compounds and their generality and significance.
Lists of these counts on the component parts of chemical compounds are
6. A STUDY OF PUNCHED CARD TECHNIQUES APPLIED TO THE INDEXING
OF CHEMICAL PLANT ENGINEERING DRAWINGS. Charles
B. Stewart, Jr., E. I. du Pont de Nemours & Co., Charleston, W. Va.
The design of a punched card index to engineering drawings is something
that must be carefully related to the ordinary card index which is
usually already in existence when the benefits of a punched-card type are
to be consummated. Compatibility of the new with the old is a must during
the transition period. Another set of constrictions on what may be done
is the necessary relationship to the numbering of equipment units by other
plant departments, such as accounting, production, and maintenance. IBM
machines were available, and IBM cards were suitable to the indexing requirements
Basic requirement to get started is an agreed statement of how the card
index shall operate, supplemented by a detailed proposal for the card design
and the various steps of producing, checking, filing, and retrieving the
cards. The index described here was designed to permit searches based on
drawing numbers, equipment numbers, title of drawing, main subject of
drawing, and classification of the drawing subject. Supplementary information
on each card shows file location, drawing size, issue date, revision date,
and file review.
Various card designs are suggested, both for cards which are to be cut
to 3 x 5 for interfiling with an existing set, and for cards in their original
form. Advantage is taken of the ease of adding printed interpretations of
the punched holes and the use of mark-sensing.
7. CODING OF SEVERAL TYPES OF CHEMICAL PATENT ABSTRACTS
FOR PUNCH CARD USE. Elizabeth W. Tapia and James H. Gardner,
National Research Corp., Cambridge, Mass.
Over a three-year period abstracts, chiefly as published in the Official
Gazette of the U. S. Patent Office had been collected on McBee Keysort
punch cards. To be useful in patent searches a coding system was needed.
A thorough examination of codes already in operation was made but these
did not satisfy the requirements. After much experimenting, a coding
system was devised which is essentially a highly simplified Uniterm
system whereby any desired combination of the terms can be used to
classify an abstract.
It was tested by applying it to the prepared cards to judge its adequacy
for this organization's needs as well as its degree of specificity. The
conclusion reached was that the code was simple and easy to use, that it
met present needs in that a manageable group of cards was selected, and
that, moreover, it could be expanded in any direction to fulfil the possible
broadening and changing requirements in the future. Practice is proving
this system, which is believed adaptable also to literature abstract files,
to be highly useful in obtaining desired information quickly and efficiently.
8. A TECHNICAL INFORMATION SERVICE USING PUNCHED CARDS
FOR INDEXING AND RETRIEVAL. William S. Jones and Peter H.
Butterfield, Carbide and Carbon Chemicals Co., South Charleston,
The tabulating laboratory of the process development department at the
South Charleston plant of Carbide and Carbon Chemicals Co. provides
mechanized technical data services for a number of research, engineering,
and process control groups in over a dozen different locations. The IBM
installation is designed to accommodate technical computing applications as
well as information processing, which permits a more elaborate and efficient
system for the latter than would otherwise be justified.
All information to be processed originates with technical personnel of
the groups subscribing to these services. Files are reviewed periodically
for duplications, corrections, and additions. Master indexes for various
types of subjects are maintained daily and tabulated on printed forms
periodically or upon request.
Several interchangeable systems of information storage and retrieval are
in current use to permit thorough evaluation of their flexibility and utility.
Documents such as patents and internal reports are indexed by a combination
of numerical decimal codes and superimposed random patterns punched
in one or more IBM cards. A single card may contain up to 31 items of
information and identification.
This paper describes the various phases of the indexing and retrieval
system from the selection of subjects in the original documents through
the transmittal of retrieved information in answer to a specific request.
Unforeseen problems which occurred only after a system had been in actual
use are described together with methods used to modify them or justify
Symposium on Results of the Practical Application of Punched
Cards to Indexing
Gilbert L. Peakes, Presiding
9. INTRODUCTORY REMARKS. Gilbert L. Peakes.
10. EXPERIENCES WITH A NOTCHED CARD FILE OF GEOCHEMICAL
DATA. Michael Fleischer, U. S. Geological Survey, Washington 25,
The U. S. Geological Survey has had a notched card file of geochemical
data for five years. The primary purpose of the file is to serve as a means
of quickly obtaining literature references on specific topics in geochemistry
The cards have spaces for each of the chemical elements and for 76 subjects,
but it has been found that it is preferable not to use adjacent deep
notches. This reduces the usable subject headings to 57. Authors are not
coded; carbons on a white 4 x 6 card are used as an author index.
The file, which now contains about 3500 cards and is expanding rapidly,
can be searched by hand in less than 30 minutes. It has proved to be ex.tremely
valuable. For example, it has recently been used in the preparation
of lists of references on the lithium content of rocks, the ratio of
strontium to calcium in ground waters, and the beryllium content of
11. CODING OF HAMMETT RHO VALUES ON PUNCHED CARDS. Hans If
Jaffe, Department of Chemistry, University of Cincinnati, Cincinnati,
The Hammett equation is one of the most generally known relations between
the structure and reactivity of organic compounds. In the process of
assembling all available information concerning this equation, it has been
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American Chemical Society. Division of Chemical Literature. Chemical Literature, Volume 7, Number 3, Fall 1955, periodical, Autumn 1955; Philadelphia, Pennsylvania. (digital.library.unt.edu/ark:/67531/metadc5757/m1/4/: accessed June 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .