๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

PENTEK* FOR IMPROVED PAINTS and VARNISHES

Book ID
126505411
Publisher
American Chemical Society
Year
1946
Tongue
English
Weight
206 KB
Volume
24
Category
Article
ISSN
0009-2347

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Sept., I917.] U.S. BUREAU OF STANDARDS NOTES. ## 439 to determine to what extent the customer benefited through periodic maintenance service. By these observations it is found that a lamp not on regular maintenance is likely to be defective 5~ times as frequently as a lamp which is regularly mai