Sulphur, body content

With regard to what we have spoken of, in order to have an idea clear and precise, and to avoid all contention on what should be meant by the word Nitre, we remark first, and if one doubt of it, it will be clearly seen by the following that there is a large number of bodies which contain a particular acid such as that of saltpeter, and consequently different in its nature and in its effects from all the other acids that we know, from those for example of alum, of vitriol, of sulphur, and of common salt. That this acid is the true nitrous principle, or the true principle of Nitre but as it is only by the aid of art, that is to say, by distillation, that this acid is found free and developed up to a certain point, and that in its natural state it is found in several sorts of terrestrial, saline, sulphureous materials which serve it as base or the matrix, it forms by that, different species of nitrous bodies which are all alike by their acid, and are different from one another by the nature of the materials which enclose the acid. ... 

Surveys for dispersion patterns of sulphide anions and compounds determined as acid-released HjS in soil have been carried out over 30 mineral deposits in China, including skams, porphyry copper deposits and porphyritic iron deposits (sulphur contents higher at the margin of the ore body), altered-brecciated gold deposits and lead-zinc deposits in volcanic breccia. Three successful case histories are summarised here. Of the remainder, only four failed to yield anomalies over mineralisation. 

Tracer experiments126 with Na235S04 added to the diet of chicken have revealed that sodium sulphate improves growth, feed efficiency, and is capable of stimulating normal feather development even when the sulphur amino-acid content in the diet is too low to support optimal growth. About 20% of sulphur from Na235S04 retained by chickens was found to be incorporated into body taurine. 

This reaction unavoidably implies the decrease of the concentration of the caustic solution over time, which, in turn, distorts chemical quantification during acid-base titrations if it is not taken into account. While maintaining all other conditions the same concentrated sulphuric acid is far more stable than caustic soda when in contact with the air. The context of application and content of the ceteris paribus clause thus differ because of the different reactivity of bodies and their degree of stability which, we have shown it, is closely related to the surroundings. The notion of fixity and that of identity which traditionally enable scientists to make inferences from comparison can easily become problematic. The content of the ceteris paribus clause becomes an object of inquiry as soon as one aims to elucidate the meaning of the clause in actual chemical contexts. 

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