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Updated: May 24, 2025
During a year or two of adolescence I used to be dabbling in chemistry a good deal, and as about that time I had my little aspirations and passions like another, some of these things got mixed up with each other: orange-colored fumes of nitrous acid, and visions as bright and transient; reddening litmus-paper, and blushing cheeks; eheu! "Soles occidere et redire possunt,"
She carried the brimming cup of her inestimable virtues with a cautious, steady hand, and an eye always on them, to see that they did not spill. Then she was an admirable judge of character. Her mind was a perfect laboratory of tests and reagents; every syllable you put into breath went into her intellectual eudiometer, and all your thoughts were recorded on litmus-paper.
By distillation at 120° F. The vapour, as it passes along a glass tube, may be decomposed by heat into chlorine, hydrochloric acid, and carbon the first shown by setting free iodine in iodide of starch, the second by reddening blue litmus-paper, and the last by its deposit. Tests. Taste, colour, weight; burns with a green flame; dissolves camphor, guttapercha, and caoutchouc.
During a year or two of adolescence I used to be dabbling in chemistry a good deal, and as about that time I had my little aspirations and passions like another, some of these things got mixed up with each other: orange-colored fumes of nitrous acid, and visions as bright and transient; reddening litmus-paper, and blushing cheeks; eheu! "Soles occidere et redire possunt,"
Nay, but your Morelli, your Crowe, ciphering as they went for want of thought, what did they do but screw Art into test- tubes, and serve you up the fruit of their litmus-paper assay with vivacity, may be, but with what kinship to the picture?
We have no litmus-paper, but, see, here they come with the syrup of violets." The doctor was right; steps were heard in the passage. M. d'Avrigny opened the door, and took from the hands of the chambermaid a cup which contained two or three spoonfuls of the syrup, he then carefully closed the door.
"We have microbe tests that show us as unmistakably whether the germs of any particular disease like malaria, typhoid, or scarlet fever are present in the air, as litmus-paper shows alkalinity of a solution. We also inoculate as a preventive against these and almost all other germ diseases, with the same success that we vaccinate for smallpox.
We have no litmus-paper test for the charm of genius. Under us the dry leaves crackled like twigs snapping in a fire, and the flying sand cut the bushes along the roadway like a storm of whizzing hailstones. In the wide water of the Valley River the moon flitted, and we led her a lively race. When I was little I had a theory about this moon. The old folks were all wrong about its uses.
We begin skirmishing with a few light ideas, testing for thoughts, as our electro-chemical friend, De Sauty, if there were such a person, would test for his current; trying a little litmus-paper for acids, and then a slip of turmeric-paper for alkalies, as chemists do with unknown compounds; flinging the lead, and looking at the shells and sands it brings up to find out whether we are like to keep in shallow water, or shall have to drop the deep-sea line; in short, seeing what we have to deal with.
He dipped into this bottle or that, drawing out a few drops of each with his glass pipette, and finally brought a test-tube containing a solution over to the table. In his right hand he held a slip of litmus-paper. "You come at a crisis, Watson," said he. "If this paper remains blue, all is well. If it turns red, it means a man's life."
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