Word: sun-spot
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...machine invented by Dr. G. W. Pickard, electrical engineer, has been operating in his private laboratories, but is being transferred to the Astronomical Laboratory because of the more advantageous location and the recent study that is being made there of the sun-spot cycle, a phenomenon which is expected to reach its peak in size and number this month...
...apparatus is the result of a careful study of the signal strength of radio reception in connection with sun-spot observations. The study revealed that there was a definite correlation between the appearance of spots on the sun's surface and the conditions of radio reception. The new machine, by means of a device that is similar to a weather graph, can measure the amount of change that takes place in the signal strength of radios during the sun-spot cycle...
...observations, states that the effect of solar eruptions, which appear as spots on a photographic negative, upon the electrical conditions of the earth's atmosphere, are known to play an important part in determining weather and seasonal changes. The Weather Bureau is making a thorough investigation of sun-spot phenomena with a view to predicting the general characteristics of whole seasons. The precipitation of rain, the recurrence of storms, and electrical disturbances in the earth's atmosphere, depend to a large degree upon the upper atmosphere, and this in turn is directly responsive to solar convulsions...
...Meterological Institute issues a bulletin stating how the earth-shock coincided with the passage of a sun-spot over the central meridian of the sun. Various seismographic measurements tell the strength of the shock; and this constitutes almost the sum of our understanding of a particularly terrifying fact...
...PHYSICAL COLLOQUIUM. "Zeeman: on the Magnetic Separation of Absorption Lines in Connection with Sun-Spot Spectra." Dr. H. L. Blackwell. Jefferson Physical Laboratory, Room...