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By the deficiency or absence of one necessary constituent, all the others being present, the soil is rendered barren for all those crops to the life of which that one constituent is indispensable.

Justus von Liebig

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Justus von Liebig
Age: 71 †
Born: 1801
Born: May 12
Died: 1873
Died: April 18
Agronomist
Chemist
Inventor
University Teacher
Justus Freiherr von Liebig
Baron von Liebig
Earth
Barren
Life
Crops
Indispensable
Soil
Absence
Constituent
Necessary
Rendered
Present
Deficiency
Others
Constituents

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Observation is like a piece of glass, which, as a mirror, must be very smooth, and must be very carefully polished, in order that it may reflect the image pure and undistorted.
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Chocolate is a perfect food, as wholesome as it is delicious, a beneficent restorer of exhausted power...it is the best friend of those engaged in literary pursuits.
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I have spent some months in England, have seen an awful lot and learned little. England is not a land of science, there is only a widely practised dilettantism, the chemists are ashamed to call themselves chemists because the pharmacists, who are despised, have assumed this name.
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From one sublime genius-NEWTON-more light has proceeded than the labour of a thousand years preceding had been able to produce.
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Receiving a new truth is like adding a new sense.
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In the progressive growth of astronomy, physics or mechanical science was developed, and when this had been, to a certain degree, successfully cultivated, it gave birth to the science of chemistry.
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In this apparatus is nothing new but its simplicity and thorough trustworthiness. On his revolutionary method of organic analysis.
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The person who observes a clock, sees in it not only the pendulum swinging to and fro, and the dial-plate, and the hands moving, for a child can see all this but he sees also the parts of the clock, and in what connexion the suspended weight stands to the wheel-work, and the pendulum to the moving hands.
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The loveliest theories are being overthrown by these damned experiments it's no fun being a chemist anymore.
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If it is impossible to judge merit and guilt in the field of natural science, then it is not possible in any field, and historical research becomes an idle, empty activity.
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But it must not be forgotten that ... glass and porcelain were manufactured, stuffs dyed and metals separated from their ores by mere empirical processes of art, and without the guidance of correct scientific principles.
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The more fodder, the more flesh the more flesh, the more manure the more manure, the more grain.
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Chemistry, in its application to animals and vegetables. Endeavours jointly with physiology to enlighten us respecting the mysterious processes and sources of organic life.
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A time will come, when fields will be manured with a solution of glass (silicate of potash), with the ashes of burnt straw, and with the salts of phosphoric acid, prepared in chemical manufactories, exactly as at present medicines are given for fever and goitre.
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The secret of all those who make discoveries is that they regard nothing as impossible.
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I have learnt that all our theories are not Truth itself, but resting places or stages on the way to the conquest of Truth, and that we must be contented to have obtained for the strivers after Truth such a resting place which, if it is on a mountain, permits us to view the provinces already won and those still to be conquered.
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A fact acquires its true and full value only through the idea which is developed from it.
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A manure containing several ingredients acts in this wise: The effect of all of them in the soil accommodates itself to that one among them which, in comparison to the wants of the plant, is present in the smallest quantity.
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