. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 14 BULLETIN 1328, IT. S. DEPARTMENT OP AGRICULTURE INFLUENCE OF STORMS AND RAIN The period of the season of 1922 in which these data were obtained included many bright days on which storms occurred during the course of the afternoon, giving an excellent opportunity to study the behavior of the bees on the approach of a storm; in fact, for the purposes of a brief general study of flight activities, there were too many such days. The influence of a storm is well shown by the data for a single day (Table 3, and fig 4.) Th
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 14 BULLETIN 1328, IT. S. DEPARTMENT OP AGRICULTURE INFLUENCE OF STORMS AND RAIN The period of the season of 1922 in which these data were obtained included many bright days on which storms occurred during the course of the afternoon, giving an excellent opportunity to study the behavior of the bees on the approach of a storm; in fact, for the purposes of a brief general study of flight activities, there were too many such days. The influence of a storm is well shown by the data for a single day (Table 3, and fig 4.) The records on which this curve is based were. /oo \ Fig. 4.—Flight, temperature and hive-weight data for May 15, 1922, showing the effect of a threatened storm ( p. m.) on nights taken on May 15, a bright, sunny day until the afternoon. The following chronological data show the weather conditions: Time Weather conditions A clouding over is noticed. The very much darkened sky indicates the sudden approach of a storm. It is thundering, and an increase in the number of heavily laden nectar-carrying bees is noted at the gates. A gusty wind is blowing, precipitation being expected any minute. The storm is passing from a westerly direction to a southerly. The very dark nucleus of the storm, where precipitation appears to be tak- ing place, is from 3 to 4 miles away. The air is calmer, the storm having passed without any precipitation. The sun is shining occasionally and for short intervals. The sun is shining steadily, and it has cleared up completely. [This condition continued for the remainder of the day.] No better example of the sudden approach of a storm with all its symptoms to the very point of precipitation, but without actual pre- cipitation, could have been Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these
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