316 TRANSACTIONS, NATURAL HISTORY SOCIETY OF GLASGOW. 



frost were registered on several mornings up to the 17th. The 

 8th — the Spring Holiday — was a day of heavy rain and cold 

 wind. On the 17th, however, a change took place in the weather, 

 and it became much warmer, with much bright sunshine. These 

 conditions prevailed till the close of the month, except that on 

 one or two days the wind was cold and from the east. 



The barometer during the first fortnight was unsteady, and 

 there were some sudden changes. For the latter part of the 

 month the pressure was much more regular and the readings 

 fairly high. The lowest reading (28*70 inches) was taken on the 

 8th, and the highest (29" 96 inches) occurred on the 26th. 



Eain to the depth of 3' 30 inches fell during the month, the 

 greatest daily total being 1'25 inches on the 3rd. There were 

 13 dry days. 



The total frost was 11°, and was registered on 6 days, and 

 the coldest day was the 11th, when the thermometer showed 

 4° of frost. The average maximum and minimum temperatures 

 were 54° and 37° respectively. For April of 1900 there were 

 14° of frost for 6 days, and the average maximum and minimum 

 temperatures were 55° and 38° respectively. 



The warm and genial nature of the weather during the latter 

 part of the month gave a strong impetus to the growth of 

 vegetation. Trees generally showed well in leaf, whilst the 

 earlier varieties of rhododendrons, ribes, geans, and bird cherry 

 were in full bloom. Narcissi were also in full flower, and tulips 

 were rapidly opening. 



May. — This proved to be one of the finest months of the year, 

 there being ample sunshine, with just sufficient coolness in the 

 wind to make the atmospheric conditions the best for outdoor 

 recreation. On the second of the month the Glasgow Exhibition 

 was opened with the proverbial " Queen's weather," and the 

 pleasant nature of the weather during the opening weeks went 

 far to ensure the success of the undertaking. The 7th — the date 

 which was originally fixed for the opening of the Exhibition — 

 was one of the few disagreeable days of the month, being wet and 

 cold. 



The rainfall was 1*91 inches, and there were 21 dry days. 



No frost was registered at Queen's Park during the month, 



