Two Lectures on the Rational Manuring of Field Plants by Paul Wagner, Director of the Agricultural Research Station, Darmstadt, translated by G.G.Henderson, University of Glasgow, with eight autotype photographs of plant cultivations printed in the text,

Two Lectures on the Rational Manuring of Field Plants by Paul Wagner, Director of the Agricultural Research Station, Darmstadt, translated by G.G.Henderson, University of Glasgow, with eight autotype photographs of plant cultivations printed in the text,

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