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  2. SCIENTIFIC ITEMS.

    The effect of chemistry upon civilisation has been greater than that of any other science. Medicine owes tot chemistry the discovery of ...

    Article : 85 words
  3. Advertising

    {No abstract available}

    Advertising : 229 words
  4. WORLD-WIDE NOTES.

    Estimates of tree-ages from the socalled annual rings appear to be of doubtful accuracy. Mr. H. N. Thom son, conservator of forests for ...

    Article : 107 words
  5. SCIENCE OF SHIP STEERING.

    The difficulty of keeping a modern steamship on a straight course is no slight one The helmsman, of course, steerso by the compass, and a small ...

    Article : 146 words
  6. THE PLOW OF ROOKS.

    Among the grants made by the Carnegie Institution in support of scientific investigations is one item bearing this quaint title, "For ...

    Article : 136 words
  7. MAKING MINUTE MEASURE-MENTS.

    With changes of temperature the balance wheels of watches expand and contract, giving them a tendency to run slower or faster, according to ...

    Article : 184 words
  8. FLYING RACES: SLOW PLYING MOSTDT DIFFICULT.

    To fly in ah aeroplane it is simply necessary to exert an upward lifting force greater than the downward pull of gravity. The question is how ...

    Article : 425 words
  9. PRINTING BY X-RAYS.

    There is a process of printing by X-rays, technically called typoradiography. One way prepare the original copy is to print the text ...

    Article : 234 words
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