Information Bureaux and Special Libraries

Date:
24 September - 27 September 1926
Reference:
WA/HMM/CM/Sal/37/3
Catalogue details

Licence: Public Domain Mark

Credit: Information Bureaux and Special Libraries. Source: Wellcome Collection.

    48/158 (page 24)
    of its meaning; if equal, then we call the terms Synonyms and prefix the equal sign; if greater, then we call the terms Higher Collectives and mark them ¢; if smaller, then we call them Lower Specifics and mark them) . For every concrete in the card index there is a first guide on which these related terms are tabulated, as shown in the figure following :— 14.—Central Index Unit. EES EES © | BOILER SS ERANCE P2 120-67 INSPECTING ————) CANADA | = TESTING \ SSS | REPAIRINOL, the, ~ ~ x =S/OPERMING\=- al ==/FIRING \, =/EXPLOSION\, ACCIDENT. >LOCOMOTIVE <PRESSURE = fieto4 ESSEL PRESSURE- =STEAM- =STEAM GENERATOR >MULTITUBULAR- “NY | >FIRETUBE- ' >WATERTUBE- Ey 15.—This figure shows the concentration at one point of all the information in the index on one concrete, Boiler (written at the left upper corner of each card). (a) The concrete term Boiler is shown on the tab of the first guide, indicating the alphabetical position of Boiler in the Central Index as a whole. (b) In the body of this guide are tabulated the related terms and logical connections of Boiler, so far as they exist in the index; the dash after the terms stands for the term on the tab, Boiler; the signs preceding the terms indicate synonyms, higher collectives and lower specifics. (c) The centre guide, Canada, indicates division of Boiler cards by countries (countries have not been mentioned because they do not lead to any difficulties).