Effect of magnetic fields upon thermal conductivity of iron, gold, copper, silver and zinc

✍ Scribed by G.F.S.

• Book ID: 104127807
• Publisher: Elsevier Science
• Year: 1929
• Tongue: English
• Weight: 61 KB
• Volume: 207
• Category: Article
• ISSN: 0016-0032
• DOI: 10.1016/s0016-0032(29)91312-0

✦ Synopsis

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 where the visibility is not reduced by smoke. Besides the name of the town or city, the marking should include an arrow pointing due north with the letter "N" over it and a smaller letter indicating the airport if there is one.