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Fit into each stopper one short and one long glass tube, the long tube extending below the limewater. Connect the short tube of one bottle and the long tube of the other bottle with a Y-tube. Now breathe slowly three or four times through the Y-tube. It will be found that the inspired air passes through one bottle and the expired air through the other.
Ignite the charcoal in a hot flame and lower it into a vessel of oxygen. Observe its combustion, letting it remain in the bottle until it ceases to burn. Has anything been formed in their stead? Cover the bottle with a piece of cardboard, and bring the gas and the limewater in contact by shaking. If it turns white, the presence of carbon dioxide is proved.
The linseed, ginger, limewater, cinnamon, and several other small articles, are added or withheld according to the taste or practice of the brewer, which accounts for the different flavours so observable in London porter.
If your teacher has a glass of limewater, and will let you breathe into it through a tube, you will see that your breath soon makes the water look milky. This shows that the gas in your breath is not like the air about you; because air was all over the top of the limewater, yet did not change it at all. The milky look is caused by carbon dioxid, one of the poisons in your breath.
One of these you can see in the milky limewater, and others you can smell when you happen to come close to anyone else. If you blow on your fingers, you feel that your breath is much warmer than the air. If people are crowded together in rooms with doors and windows shut, their breath soon heats and poisons the air, until they begin to have headache, and to feel dull and drowsy and uncomfortable.
"A piece of this," he told Emmy discontentedly, "would set you right up; put something in your veins besides limewater." She became painfully upset at once and fumbled in her lap, with her face averted, as the attention of the table was momentarily directed at her. There was an uncontrollable tremor of her loose colorless mouth. What a wife for him, August Turnbull!
Achim von Arnim and Jean Paul were his guides in those days: the one adorned the world of the senses for him, the other that of the soul. On the police department’s identification blank Daniel had called himself a musician. Frau Hadebusch brought the paper into her living room, which, like all the rooms of the house, seemed built for dwarfs and reeked of limewater and lye.
Turnbull's hand a glass of milk thinned with limewater and an elaborate platter holding three small pieces of zwieback. She could eat practically nothing. It was the particular character of her state that specially upset August Turnbull.
Compare the effect upon the limewater in the two bottles. Insert a small burning splinter into the top of each bottle and note result. What differences between inspired and expired air are thus shown? Blow the breath against a cold window pane. Now breathe several times upon the bulb, noting the rise in the mercury. What does this experiment show the body to be losing through the breath?
Burn a splinter in a large vessel of air, keeping the top covered. Add limewater and shake. Barely cover the marble with water, and then add hydrochloric acid until a gas is rapidly evolved. This gas is carbon dioxide. Light a splinter and extinguish the flame by lowering it into the vessel of carbon dioxide.
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