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Updated: June 4, 2025
Place some bits of shaving in the tube, cork it, and make the cork perfectly air-tight by coating it with bees wax or paraffine. Heat the test-tube gently over an alcohol lamp. Care should be taken to expel all the air before lighting. That the burning hydrogen forms water by uniting with the oxygen of the air, may be shown by holding a cold glass tumbler over the jet, or over any flame.
Howard Bemis, who was sitting next to it, edged away imperceptibly till he nearly crowded Ann off her chair. Presently Willie returned. He picked up the test-tube, put it in his pocket with a certain jauntiness, and left the room again. "Now, if you hear a sudden bang and find yourself disappearing through the roof," said Jimmy, "that will be it."
It was well along toward morning when he obtained in a test-tube a few drops of a colourless, odourless liquid. "My interferometer gave me a clue," he remarked, as he held the tube up with satisfaction. "Without the tell-tale line in the spectrum which I was able to discover by its use I might have been hunting yet for it.
Douglass Byrd thought it all up a month ago for us Juniors because of our Senior oppression and after his great loss he went on just the same helping us practise and seemed to be as interested in us as if we had been explosives in a bottle or a test-tube or a retort. His great serenity of soul is a constant lesson to me. Good-night, Louise.
There, covered with the water, it gently swirled and curdled, with strange metallic glints and oily sheens, as Beatrice with a gold spoon stirred it at the engineer's command. From moment to moment he dropped in a minute quantity of glycerin, out of a glass test-tube, graduated to the hundredth of an ounce.
The stratum of ether decanted off is mixed in a test-tube with a drop of acetic acid. A red color appears if the slightest trace of magenta is present. The shaking must not be too violent, lest an emulsion should be formed. If the wine is colored with archil, on prolonged heating, after the addition of ammonia, it is decolorized. If it is then let cool and shaken a little, the red color returns.
No matter: the fall is not serious for the lithe backs of the young grubs; and, in a few days, the test-tube is filled with larvae, in which it is easy to recognize the Flesh-fly's family by the fringed coronet that opens and shuts at the maggot's stern like the petals of a little flower.
Yet now and again she recalled the sudden liking she had felt for Miss Clifford, and at these moments she wondered what was happening to the old cotton manufacturer up there in La Californie. She knew the doctor called twice daily. She decided to question him. "Doctor, what happened to Sir Charles Clifford?" "Happened?" The doctor frowned into a test-tube and waited for her to explain.
To do a survey or make a bridge or lay a telephone is all in the day's work. But your sapper is a man of ideas, and is for ever seeking out new inventions. So he has turned his attention to chemistry, and "R.E." has a chemical corps which has put aside the blow-pipe and the test-tube at home to come out and study the applied chemistry of war.
Wiley took a piece of scheelite and pounded it in a mortar until it was fine as flour, then dropped it into a test-tube and boiled it over a flame in a solution of hydrochloric and nitric acids. "Now," he said, when the tungstic acid had been dissolved, and he had dropped a small bar of tin into the solution. It turned a dark blue and Blount sighed again, for he had looked up the test in advance.
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