nov. 1891.] the botanical society of edinburgh. 211 



On Temperature and Vegetation in the IvOyal Botanic 

 Garden, Glasgow, during July, August, September, and 

 October. By Egbert Bullen, Curator of the Garden, 



JULY. 



This was the driest summer month experienced here 

 since July 1885, but the temperature was much higher this 

 month. The readings on the shaded thermometer varied 

 during the month from 63° to 76°, and on that in the sun 

 from 75° to 101°. The lowest night temperature was 44° 

 and the highest 56°. Dull mornings were frequent, but 

 generally followed by bright days ; altogether, a bright sunny 

 month. Trees, shrubs, and various crops suffered much by 

 lack of moisture ; numerous pansies, &c., died out in the 

 open borders, but the various Californian annuals and the 

 usual assortment of bedding-out plants were very effective, 

 the bright weeks having brought out the natural brilliancy 

 of their flowers. The leaves had a parched appearance. 



AUGUST. 



In striking contrast to last month, this was mostly 

 cloudy and wet, the latter part unusually so, and the rains 

 were often so heavy as to greatly discount the previous 

 harvest prospects. At this time the prospect was further 

 darkened by the rapid development of the potato-blight in 

 many districts of the country, the meteorological conditions 

 being highly favourable. Occasional bright days were 

 recorded, and bright sunshine, but generally of short duration. 



The highest reading of the sun thermometer was 90° on 

 the 18th, but frequently the reading was below 80°. The 

 temperature in the shade was also low for the month. 

 Half-hardy plants made good growth and bloomed well 

 until the stormy night of the 25th, which gave them a very 

 tattered appearance. 



SEPTEMBER. 



This was a rainy, stormy month ; probably one of the 

 viest known in meteorological history. The storms and 

 floods were most injurious to garden and farm crops of all 



