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The first business of this part of the tongue is, therefore, to warn us emphatically against caustic substances and corrosive acids, against vitriol and kerosene, spirits of wine and ether, capsicums and burning leaves or roots, such as those of the common English lords-and-ladies.
In summer eat cooling food, acids, and no spices. In winter, on the contrary, eat warming foods, rich in spices, mustard, and other heating substances. In cold and warm climates one should eat according to the climatic conditions. There are certain harmful foods that should be avoided.
It is a really thrilling experience, standing in the presence of the only portions of these new substances that have been isolated, to hear Professor Ramsay and Dr.
"And he probably has. I should not like to be in the astrologer's shoes." "You believe in Docre's potency, then. Tell me, how does he operate, with the blood of mice, with broths, or with oil?" "So you know about that! He does employ these substances. In fact, he is one of the very few persons who know how to manage them without poisoning themselves. It's as dangerous as working with explosives.
Such words indeed as denote substances capable of subsisting by themselves occasionally take suffixes, indicating that those substances form the distinguishing attributes of other substances as when from danda, 'staff, we form dandin, 'staff-bearer'; in the case, on the other hand, of substances not capable of subsisting and being apprehended apart from others, the fact of their holding the position of attributes is ascertained only from their appearing in grammatical co- ordination.
The very quality that makes them capable of bringing forth they derive from their source, as being the outmosts of atmospheres, with which they are constantly in accord. Such a conatus and quality are said to be in lands, but it is meant that they are present in the substances and matters of which lands consist, whether these are in the lands or in the atmospheres as exhalations from the lands.
And on an auspicious lunar day, at an auspicious moment, and under the influence of a star presided over by an auspicious deity, that mighty bowman, having been honoured by twice-born ones, and been bathed with auspicious and holy substances and also worshipped by speech set out, filling with the rattle of his car the three worlds, with their mobile and immobile objects."
That is why the smell and taste of these pungent substances are so much alike, as everybody must have noticed, a good sniff at a mustard-pot producing almost the same irritating effects as an incautious mouthful.
Thus it will occur to some that this property, already discovered in many substances where it exists in more or less striking degree, is, with differences of intensity, common to all bodies, and that we are thus confronted by a phenomenon derived from an essential quality of matter.
Here is an example in confirmation, taken from Duclaux's book on Pasteur: Herschel established a relation between the crystalline structure of quartz and the rotatory power of the substance; later on, Biot established it for sugar, tartaric acid, etc. i.e., for substances in solution, whence he concluded that the rotatory power is due to the form of the molecule itself, not to the arrangement of the molecules in relation to one another.
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