When humus remains constantly damp, without, however, being covered with water, it forms a very unpleasant smelling acid, which is more particularly,… - Albrecht Daniel Thaer
" "When humus remains constantly damp, without, however, being covered with water, it forms a very unpleasant smelling acid, which is more particularly, characterized by the property which it possesses of colouring blue litmus paper into red. This circumstance has long been known, and it is the reason that land and meadows which are not properly drained, and which exhibit these phenomena, are called sour. We have carefully examined these facts, and have endeavoured to discover the peculiar constitution of this acid. At first, we were inclined to regard it as being of a distinct nature, and having carbon for its base; but we have since become convinced that it is generally composed of acetic acid, and occasionally contains a portion of the phosphoric. This latter always adheres so firmly to the humus that it cannot be separated from it either by boiling or washing. The liquid in which the humus is boiled certainly acquires a slight acid flavour, but the greater part of the acid remains attached to the humus.
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About Albrecht Daniel Thaer
Albrecht Daniel Thaer (14 May 1752 – 26 October 1828) was a renowned German agronomist and an avid supporter of the humus theory for plant nutrition.
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Alternative Names:
Albrecht Thaer
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Thaer, Albrecht Daniel
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Albrecht D. Thaer
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In my eighteenth year, my father sent me to the . The first winter I did not leave the Anatomical School, and although I gave myself up to the most intense study, I willingly entered into all the gaities and amusements so much sought by German students, but avoided carefully debaucheries of any kind; they gave me the cognomen, Half Benommist, owing to my puerile look and feeble and weak voice. Unzer and Ebeling, two students in physic, took me under their powerful protection, and extricated me out of many scrapes.
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In the mean time I paid the strictest attention to my profession, and was so completely successful, that there was no patient of any consequence in Gottingen that I was not called in to; but as I was not allowed to make up prescriptions, not having taken my degree, and in order to avoid a heavy penalty, I was accompanied in my professional visits by Doctor Tolle, a man who knew the lectures of Schroder by heart, but did not understand them. I dictated to him what to prescribe, he took the fee, and was content. I had nothing but the honour, and plenty of good dinners. At last I took my degree as Doctor of Medicine, and resigned my patients to the care of Dr. Strohmeyer, which was the means of introducing him into practice. I left Gottingen full of honour, with tears in my eyes, at leaving behind me so many dear friends. Puffed up with pride, I arrived in Celle, but was received with coldness and pity. This was too much for mc; I could not brook the insult; but said to myself, "How can I expect to be otherwise received, when I consider my former conduct, and look back on the heedless manner in which I passed my boyish years?" My consolation was, that "I should be soon as happy here as I was in Gottingen" in the choice of my friends.
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