Airships past and present, together with chapters on the use of balloons in connection with meteorology, photography and the carrier pigeon . t observations made under conditions borderingon unconsciousness are very liable to error. It is known that aballoon falls with a maximum speed of 16 ft. per ButGlaishers figures point to a fall at the rate of 130 ft. per second, 1 During the summer of 1S02 a descent was made by the author in companywith Professor Miethe ; the readings of the barometer certainly showed a maximumspeed of more than 33 ft. per second. But a thunderstorm was raging
Airships past and present, together with chapters on the use of balloons in connection with meteorology, photography and the carrier pigeon . t observations made under conditions borderingon unconsciousness are very liable to error. It is known that aballoon falls with a maximum speed of 16 ft. per ButGlaishers figures point to a fall at the rate of 130 ft. per second, 1 During the summer of 1S02 a descent was made by the author in companywith Professor Miethe ; the readings of the barometer certainly showed a maximumspeed of more than 33 ft. per second. But a thunderstorm was raging at the time,and the strong downward wind increased the speed of falling. 252 AIESHIPS PAST AND PBESENT. and if it had actually fallen at anything like that rate it woulddoubtless have been torn to pieces. The apparent errors inGlaishers results are doubtless due to the effects of solarradiation. It was evident that a number of important problems could notbe solved by ascents from a single spot, and that it would benecessary to organise ascents from many places, and, if possible,to establish observatories for the purpose. It was further.
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