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Die an der runden Schul—Wandtafelkreide in der Eänge verlaufende
Gradkantre soll ein. fortrollen der Kreide von schrägen Flächen,
Pulte, Bänke und Tische verhindern,- und gewährleistet gleichzei— tig eine erhöhte Bruchfestigkeit» Außerdem ergeben sich durch,
die geraden Seitenflächen der Gradkante verbesserte Schreibeigenschaften,
"beim Schreiben von Schriften»
Schut zansprucn r
Runde Schul—WandtSfölkreide wird dadurch gekennzeichnet, daß
auf ihrer ganzen länge- eine Gradkante angegossen wird.*
A study of the attitudes and opinions of administrators, teachers of business and teachers of social studies toward the place of economics in the secondary school.