Jax. 1893.] BOTANICAL SOCIETY OF EDINBURGH. 



>59 



month. So much frost has not been registered at the 

 garden for December since 1879. During the correspond- 

 ing month of 1891, frost was registered on eighteen 

 mornings, the total amount being 83° only. The lowest 

 readings of the thermometer for the last month occurred 

 on the 3rd, 16°; 4th, 16°; 25th, 15°; 26th, 12°; 27th, 

 13°. The lowest day temperature was 24°, which occurred 

 on the 25th of the month, and the highest 56°, on the 18th. 

 On the rock-garden only one plant came into flower, 

 namely. Primula inflata. A special feature is the deep 

 russet-brown tints of the foliage of the varieties of Thuya 

 orientalis, which on the south side of the plants is much 

 more pronounced than on the north, giving them a very 

 curious appearance. During summer the brown tints dis- 

 appear, and assume a golden colour. The total number of 

 species and well-marked varieties which have flowered on 

 the rock-garden during the year 1892 amounts to 1211, as 

 against 1216 for 1891. The largest number came into 

 bloom during the month of June, A record lias been kept, 

 showing the date when each plant was first observed in 

 flower. The number of species which came into flower 

 each month was as follows : — January, 7 ; February, 3 1 

 March, 39 ; April, 119 ; May, 282 ; June, 330 ; July, 237 

 August, 103 ; September, 45 ; October, 15 ; November, 2 

 December, 1 : — total, 1211. 



Readings of exposed Thermometers at 

 Rojal Botanic Garden, Edinburgh, d 



the Rock-Garden of the 

 urine; December 1892, 



