444- TRANSACTIONS AND PROCEEDINGS OF [Sess. lvi 



even if one measurement be made immediately after the 

 other. 



If the interval between two periodical measurements 

 be long, so that the growth in the interval has been consider- 

 able, there is not so much likelihood of obtaining an 

 unreliable record ; but such measurements cannot be relied 

 on to determine small increments. 



On Temperature and Vegetation in the Botanic 

 Garden, GLASG0^Y, during May 1892. By Egbert 

 Bullen, Curator of the Garden. 



No frost was registered here during the month, but on 

 several nights the temperature was near the freezing point. 

 The first twelve days of the month were very dry ; the sun 

 thermometer on most days registered from 70^ to 83°. 



On and after the 13th very variable weather was 

 experienced, with freqvient and often heavy rain, which was 

 much needed, vegetation at the time being in a starved and 

 backward state. From this time what is commonly known 

 as good growing weather prevailed to the end of the month, 

 and all hardy plants made rapid growth, but still the season 

 is a late one. As these lines are being written (June 6) I 

 notice the common Ash is only developing its leaf-buds. 



Late sown seeds of Californian and other annuals have 

 had the advantage of those sown three weeks earlier, owing 

 to the dry days and cold nights of early May. 



On Temperature and Vegetation in the Eoyal Botanic 

 Garden, Edinburgh, during May 1892. By Egbert 

 Lindsay, Curator of the Garden. 



The past month of ]\Iay has been on the whole very 

 favourable. During the latter portion of the month an 

 aljundant supply of rain fell ; this being succeeded by warm 

 genial weather, vegetation advanced at a rapid rate. The 

 foliage of deciduous trees came rapidly forward, and' towards 

 the end of the month was remarkably fine and luxuriant. 



The flowering of the ordinary ornamental trees and shrubs 

 is far above the average this season in wealth of blossom. 

 Horse-chestnut, various species of Fyrus and Frunus, Lilac, 



