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SOURCES OF ERROR IN GLASS VOLUMETRIC APPARATUS 1
Author(s) -
Renn H. V. E. M.
Publication year - 1926
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1926.tb17963.x
Subject(s) - calibration , period (music) , materials science , mineralogy , geology , mathematics , acoustics , physics , statistics
The most serious source of error is the original calibrating operation. Errors introduced are due principally to following causes: (a) volumetric inaccuracy, (b) variation of bore, (c) delivery time, (d) incorrect marking of the meniscus, (e) after‐working of the glass. Elimination of errors due to these causes is discussed. An apparatus for the calibration of volumetric apparatus is described. A source of error that is not usually recognized is the occurence of after‐changes in the glass during a period immediately following manufacture. The length of this period varies with the composition of the glass. Experiments by the writer upon glass volumetric apparatus show that a period of seven months is usually sufficient in order to avoid excessive error from this source.