132 TRANSACTIONS, NATURAL HISTORY SOCIETY OF GLASGOW. 



The maximum thermometer in shade was above 60° on 19 days, 

 the three hottest days being the 1st, with 76°; the 2nd, with 

 80°; and the 3rd, with 82°. The average temperatures are, 

 therefore, high, the maximum being 62° and the minimum 47°, 

 compared with 58° and 46° respectively for SejDtember, 1905. 

 The above average temperatures are the highest recorded for 

 September since 1899, when these were 63° and 48°. 



With the fine weather cereals ripened rapidly, and much 

 harvesting was accomplished during the latter half of the month. 

 The defoliation of deciduous trees in and around the city 

 became very pronounced, and by the end of the month many 

 were quite divested of leaves. 



October. — There w T as a decided change in the character of the 

 weather from that which was experienced in the preceding 

 month. While September was dry and fine, October was wet 

 and sunless. The first week was very mild, but dull, and rain 

 fell on the 1st and 4th. The weather gradually got cooler, and 

 frost set in on the evening of the 13th, and on the morning 

 of the 14th 6° of frost were registered. This was the first 

 frost of the autumn, which destroyed all tender plants and 

 practically finished the display of flowers for the season. Though 

 there were occasional fine days, very few were without rain 

 during the twenty-four hours. These rains, at times mixed with 

 hail, were frequently heavy and cold, and, as the winds were 

 often strong, the weather conditions were not too pleasant. 



The erratic line of atmospheric pressure was within a very 

 moderate range during the first three weeks, the pressure see- 

 sawing between 29'80 inches on the 1st to 29*20 inches on the 

 16th, as the extremes till the 24th, when there was a sharp rise 

 to 30*10 inches on the 25th, which was followed by as sharp a 

 fall, which reached its limit on the 29th, when the barometer 

 indicated 29*00 inches. 



With only 5 dry days, the rainfall for the month was above 

 the average, the amount registered being 5*33 inches — a quantity 

 very considerably in excess of what was recorded in the preceding 

 October, when, with 18 dry days, the rainfall was only 2*57 

 inches. 



Owing, no doubt, to the prevalence of westerly winds and 

 the heavy rainfall, very little frost was registered during the 



