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Ben nodded and his guide, after indicating the various gauges, height and speed indicators and other instruments in the engine-room, led the way through another spring-closed door into a comfortably fitted up main cabin. Touching a switch he flooded the cabin with a soft light that glowed from a ground glass shade affixed to the engine-room bulkhead.
It is the indicator most generally employed for the titration of organic acids. In general, it may be stated that when a strong acid, such as hydrochloric, sulphuric or nitric acid, is titrated against a strong base, such as sodium hydroxide, potassium hydroxide, or barium hydroxide, any of these indicators may be used, since very little hydrolysis ensues.
This phonographic machine was the size and shape of a Dutch clock, and down the front of it were electric barometric indicators, and an electric clock and calendar, and automatic engagement reminders, and where the clock would have been was the mouth of a trumpet.
"If you'll come around to the observation windows you can see them," said Tom, when a look at the indicators told him Ned and Koku had stepped forth. To the front cabin he and the others betook themselves, and when the interior lights were turned out and the exterior ones turned on they waited for a sight of the two divers. "Bless my pickle bottle!" cried Mr. Damon, "there they are, Tom."
There were, however, discovered, as a result of this rigid investigation of every mechanical detail, many artful cases of pipe-plugging, of steel nuts and bolts concealed in delicate mechanical parts, of ground glass in oil-pipes and bearings, of indicators that were so adjusted as to give inaccurate readings, of fire-extinguishers filled with gasoline in fact, the manifold deceits which the Germans practised would make a chapter of themselves.
It has been noted above that the color change does not occur exactly at theoretical neutrality, from which it follows that no two indicators will show exactly the same end-point when acids and alkalis are brought together. It is plain, therefore, that the same indicator must be employed for both standardization and analysis, and that, if this is done, accurate results are obtainable.
But Jack Darrow did not propose to be cast to the ground and the flying machine and his friends with him without some further attempt to avert such a catastrophe. After the first breath-taking rush of the storm he diverted the course of the machine again upward. He could scarcely see, the driving rain was so blinding; nor could he observe the indicators before him with any clearness.
To a large extent we are misled by the impressive prominence of the visual data. In vision we are presented with a system of inter-related and simultaneously occurring sensations which we find by experience to be the sure and certain indicators of the potent obstructions which our activity encounters.
"It was four years after the Civil War and, besides there being much unemployment, the fluctuations in the value of gold, as compared with the paper currency of that day, made it necessary to have gold 'indicators' something like the tickers from the Stock Exchange to-day. Dr.
To say the least, this evidenced great ability and enterprise on the part of the youth. The dealings in gold during the Civil War and after its close had brought gold indicators into use, and these had soon been followed by "stock tickers," the first of which was introduced in New York in 1867. The success of this new but still primitively crude class of apparatus was immediate.
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