Stevens Indicator, Volumes 11-12

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Alumni and Undergraduates of Stevens Institute of Technology, 1894 - Engineering

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Page 317 - Lives of great men all remind us We can make our lives sublime, And, departing, leave behind us Footprints on the sands of time ; Footprints, that perhaps another, Sailing o'er life's solemn main, A forlorn and shipwreck'd brother, Seeing, shall take heart again.
Page 304 - During the general lassitude of mechanical exertion which succeeded the American Revolution, the utility of steam-engines appears to have been forgotten; but the subject afterward started into very general notice in a form in which it could not possibly be attended with success. A sort of mania began to prevail, which, indeed, has not yet entirely subsided, for impelling boats by steamengines.
Page 230 - The crystals should be dissolved with the aid of gentle heat, but the temperature to which the solution is raised must not exceed 30 C.
Page 229 - ... rinsed successively with distilled water and absolute alcohol and dried in a hot-air bath at a temperature of about 160 C.
Page 228 - ... through a solution of nitrate of silver in water. The silver voltameter measures the total electrical quantity which has passed during the time of the experiment, and by noting this time the time average of the current, or, if the current has been kept constant, the current itself, can be deduced. In employing the silver voltameter to measure currents of about one ampere...
Page 228 - This is supported horizontally in the liquid near the top of the solution by a platinum wire passed through holes in the plate at opposite corners. To prevent the disintegrated silver which is formed on the anode from falling...
Page 232 - Sulphate. — The treatment of the mercurous sulphate has for its object the removal of any mercuric sulphate which is often present as an impurity. Mercuric sulphate decomposes in the presence of water into an acid and a basic sulphate. The latter is a yellow substance — turpeth mineral — practically insoluble in water: its presence at any rate in moderate quantities has no effect on the cell. If, however, it is formed the acid sulphate is formed also. This is soluble in water and the acid produced...
Page 297 - States, and none, perhaps, inducements equally persuasive to make the most of them. The particular undertaking contemplated by the State of New York, which marks an honorable spirit of enterprise and comprises objects of national as well as more limited importance, will recall the attention of Congress to the signal advantages to be derived to the United States from a general system of internal communication and conveyance, and suggest to their consideration whatever steps may be proper on their...
Page 229 - The liquid should consist of a neutral solution of pure silver nitrate, containing about 15 parts by weight of the nitrate to 85 parts of water. "The resistance of the voltameter changes somewhat as the current passes. To prevent these changes having too great an efftct on the current, some resistance besides that of the voltameter should be inserted in the circuit.
Page 229 - The result will be the time-average of the current, if during the interval the current has varied. In determining by this method the constant of an instrument the current should be kept as nearly constant as possible, and the readings of the instrument observed at frequent intervals of time. These observations give a curve from which the reading corresponding to the mean current (time-average of the current) can be found. The current, as calculated by the voltameter, corresponds to this reading.

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