34 TRANSACTIONS, NATURAL HISTORY SOCIETY OF GLASGOW. 



25th, when a change occurred, and the last week of the month 

 was distinguished by weather of a soft mild nature. 



These conditions are well shown by the record of the atmos- 

 pheric pressure, which on the 1st was at 28-90 inches. From that 

 point it steadily rose until on the 5th it reached 30*20 inches. 

 It varied little between that point and 29-70 inches during the 

 remainder of the month. 



The rainfall was again below the average, and only 1*67 inch 

 was registered. Of that amount 1*21 inch fell between the 

 24th and 30th. There were seventeen dry days. In May, 

 1904, the rainfall amounted to 3-36 inches, and there were 

 fourteen dry days. Although no frost was registered during the 

 month, the radiating thermometer on the grass was at or below 

 freezing point on fifteen occasions. The lowest reading of the 

 thermometer in shade was 33°. The average maximum tem- 

 perature was 58°, and the average minimum 44°, or 2° and 1° 

 higher respectively than those of the corresponding month of 

 1904. 



While the dry hard weather had a deterrent effect on the rapid 

 growth of many trees and shrubs, the absence of frosts and 

 destructive gales, which was frequently experienced, allowed 

 the development of the foliage of such trees as Chestnuts and 

 Sycamores to proceed unchecked, and with the warm showery 

 days at the close of the month the growth was magical. The Oak 

 leafed on the 13th, and the Ash on the 21st. Deciduous trees 

 and shrubs bloomed exceedingly well, and some Rhododendrons, 

 notably R. Cunninghami, were exceedingly floriferous. 



June. — The genial mild weather which was experienced during 

 the latter days of May continued for a few days during the first 

 week. With the wind changing to the east, and continuing from 

 that quarter, there was for fully a fortnight a spell of dry cold 

 weather with bright sunshine. A change occurred on the 18th, 

 when the wind veered to the south-west, and for four days it was 

 showery and unsettled. Thereafter, until the end of the month, 

 warm, delightful weather prevailed. 



During the first nine days the atmospheric pressure tended 

 upwards, reaching 30 '00 inches on the 8th and 9th. For ten 

 days thereafter there was a gradual decline, and on the 20th the 

 barometer indicated 29 40 inches, when a squally day of rain and 



