Stevens Indicator, Volume 8Alumni and Undergraduates of Stevens Institute of Technology, 1891 - Engineering |
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Popular passages
Page 147 - RULES to know when the Moveable Feasts and Holy-days begin. TOASTER-DAY (on which the rest depend) is always the First -*-* Sunday after the Full Moon which happens upon, or next after the Twenty-first Day of March ; and if the Full Moon happens upon a Sunday, Easter-Day is the Sunday after.
Page 245 - ... insecurely enough; has to straddle out his legs, lest the very wind supplant him. Feeblest of bipeds ! Three quintals are a crushing load for him; the steer of the meadow tosses him aloft, like a waste rag. Nevertheless he can use Tools, can devise Tools : with these the granite mountain melts into light dust before him ; he kneads glowing iron, as if it were soft paste; seas are his smooth highway, winds and fire his unwearying steeds. Nowhere do you find him without Tools ; without Tools he...
Page 330 - It is easy to see how they remove the dirt, the gravel and the suspended matter ; but how do these shallow basins of sand remove the living organisms — those organisms with which you are all so familiar under the name of bacteria ; those organisms which, when they produce typhoid and other fevers, are known as disease germs ? That operation was a complete mystery until the last four or five years. But few people had ever seen or examined bacteria before that period. It is entirely a new topic in...
Page 80 - Annual Convention of the Association of American Agricultural Colleges and Experiment Stations, held at Washington, DC, November 1215, 1889.
Page 330 - It has now been shown that the bacteria remove the bacteria. The bacteria in the waters are comparatively few of a dangerous character; the great bulk of them are our greatest friends. It is through their aid, together with the oxygen of the air, that the filth in the water is destroyed. They feed upon it and they feed upon each other. Since that knowledge has been obtained, the object now is to cultivate the bacteria. In order to make the...
Page 319 - The large reservoir a is of copper, with heavy brazed bottom. This contains the cylindrical inside chamber with conical bottom B. At the lower end of this is the gauged aperture T. Inside of this chamber fits the inverted reservoir C, holding the oil to be tested. In the interior of this chamber is a tube./? extending c. M. & ST. PAUL RY'. co. (Motive Power Dept.) GIBBS
Page 58 - To suggest some idea of this vast number I take the exhausted bulb, and perforate it by a spark from the induction coil. The spark produces a hole of microscopical fineness, yet sufficient to allow molecules to penetrate and to destroy the vacuum. The inrush of air impinges against the vanes and sets them rotating after the manner of a windmill. Let us suppose the molecules to be of such a size that at every second of time a hundred millions could enter.
Page 204 - ... glass-tube about one inch in diameter, graduated from I to 100, to contain about 100 cc. of the oil. BB is a glass jacket about three inches in diameter, filled with water, as shown. C, a thermometer indicating temperature of water in jacket. D, a small brass cock for withdrawing water from jacket. E, a glass flask for generating steam to heat water in jacket. F, a glass pipe connecting the steam flask E with jacket B, delivering at bottom of jacket. G is a small cock for permitting an escape...
Page 330 - Berlin, containing 100,000 of bacteria to the cubic centimeter, and after passing through one of the filter-beds the water which comes out will contain but forty or fifty bacteria. This takes place when the rate of filtration is such that 1,000,000 gallons of water pass through those filterbeds per acre in twenty-four hours. If the rate is diminished until only 300,000 gallons pass through in that interval, the bacteria can be diminished until there are only five or ten per cubic centimeter.
Page 58 - Supposing this exhausted glass bulb, indued with indestructibility, had been pierced at the birth of the solar system ; supposing it to have been present when the earth was without form and void ; supposing it to have borne witness to all the stupendous changes evolved during the full cycles of geologic time, to have seen the first living creature appear, and the last man disappear; supposing it to survive until the fulfilment of the mathematicians...