rs are not unusual, and in a few instances the BALLONS SONDES. observatory pattern are entirely too sluggish to record enormous height of 25,000 meters has been exceeded. accurately the rapid changes of temperature, etc., ex- BT S. P. PERGUSSON OP THE BLUE HILL METEOROLOGICAL OBSERVATORY STAPP.… … Basket containing instrument elevated by ballons The most noteworthy improvement of the new sondes. method of sounding the air is the invention of Dr. Richard Assmann, director of the Royal Prussian Aeronautical Observatory. For the large balloons pre- viously employed, some of which contained 500…
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