Effect of magnetic fields upon thermal c
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G.F.S.
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Article
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1929
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Elsevier Science
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English
β 61 KB
In a printed bulletin the Fund describes the type of roof most suitable for marking and urges the use of block letters in chrome yellow with a black background. It is suggested that it should be from ~o to 2o feet in height and on roofs preferably of tiled shingles, tin or other metal, or slate wher