Put a cork in the test tube so tightly that it will not let any steam pass it, but not too tightly.
Fill a test tube one fourth full of any kind of oil, and one fourth full of water.
Hang a string in the first test tube so that it touches the bottom of the tube.
The end of the retort just touches the surface of the water in the test tube.
That's what my inventor smelled; there never was any phenol in the test tube.
Clamp the test tube so that it rests in the water in the beaker.
Clamp the thermometer so that it is held in the white of egg in the test tube.
Treat a sample of the flour in a test tube with this reagent.
If there was copper in the ore, red scales will be found in the test tube.
Come on, are you going to hand me that test tube, or will I have to come and get it?