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Excerpt from Katechismus der Elektrischen Telegraphie
Sobarb in $rüffel wollte 1827 3wei mit ,3eigern berbunbene Reiben benuben, mittel8 be9 einen berfelben einen ftärtern ober (abwäcbern Drucl auf ba8 %3affer außnben unb baburcb ben anbetu Stolben beben ober fenlen.
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