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I watched him, as he scanned the surface closely through a lens, and observed him as he scraped some substance from the pointed end on to a glass slide, and, having applied a drop of some reagent, began to tease out the scraping with a pair of mounted needles. Presently he placed the slide under the microscope, and, having observed it attentively for a minute or two, turned round sharply.
Little use to argue that of such is not the kingdom of greatness, but so long as the world is attracted by this and the human heart views this as the one desirable realm which it must attain, so long, to that heart, will this remain the realm of greatness. So long, also, will the atmosphere of this realm work its desperate results in the soul of man. It is like a chemical reagent.
The modern way of curing neurasthenia is very strange, being neither more nor less than the substitution of hypertrophy of the ego for a disease of the ego! Why not bleed their egoism, or restore the circulation of the blood from head to heart, if they do not have too much, by some violent, moral reagent!
Some experiments, in which pure nitrogen was passed over heated copper containing occluded hydrogen, suggested to the author the possibility of the formation of ammonia; only minute traces were formed. The gases were passed, before entering the tube containing the platinum, through a potash bulb containing Nessler reagent, which remained colorless.
At last though I did not think that the substance could possibly contain so subtle, deadly, and as yet unknown poison I applied Sonnenschein's reagent phosphomolybdic acid and then I obtained a result only an hour ago indeed!" "And what was the result, Professor?" He looked me straight in the face, and replied: "You have had a very narrow escape from death, monsieur a very narrow one.
But the use of a black felt hat as a means of detecting acidity or alkalinity would not commend itself to an economic mind, and we find a very excellent reagent for the purpose in extract of litmus or litmus tincture, as well as in blotting paper stained therewith. The litmus is turned bright red by acids and blue by alkalis.
The ferrocyanide of potassium is a chemical reagent of great value, giving rise to precipitates with the neutral or slightly acid solutions of metals, like the beautiful brown ferrocyanide of copper, and that of lead. When a ferrocyanide is added to a solution of a sesquioxide of iron, Prussian blue or ferrocyanide of iron is produced.
It argued energy, determination, dogged pluck when the need should arise, and so far it was good. The woods life affects various men in various ways, but all in a manner peculiar to itself. It is a reagent unlike any to be found in other modes of life.
Add to the clear liquid one or two drops of silver nitrate solution, to make sure that an excess of the reagent is present. If a precipitate, or cloudiness, appears as the drops fall into the solution, heat again, and stir until the whole precipitate has coagulated. The solution is then ready for filtration.
Each of them is an experience of thought, a moment in the life of thought, a method of exploring reality, a reagent which reveals an aspect. Truth undergoes analysis into systems as does light into colours. But the mere name system calls up the static idea of a finished building. Here there is nothing of the kind.
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