198 METEOROLOGICAL JOURNAL. 



various important productions. Tlie mean maximum temperature 

 of the days was fully equal to the average, and the blossoms of 

 fruit-trees were in consequence brought forward, but in many 

 cases only to be destroyed by unusually severe frosts at night. 

 The wind still continued to blow, cold and dry, from east and 

 north-east. There was not sufficient moisture to form clouds to 

 prevent the escape of heat from the earth by radiation. On the 

 nights of the 19th and 20th the thermometer indicated respec- 

 tively 12° and 11° below freezing. This was lower than liad ever 

 been registered in the Garden so late in the season ; eighteen 

 nights in the month were more or less frosty. Apples were 

 killed even in the unexpanded flower-buds. Peach and Nec- 

 tarine blossoms situated close to the wall, and having a thin 

 screen in front were saved ; those more distant from the wall 

 perished. 



May. — After two days of south-west wind, accompanied with 

 rain, in the end of last month, the wind veered by west and 

 north, and again from north-east, very dry through the day and 

 frosty at night, up to the 6th of the present month. On this day, 

 the highest temperature was 54° ; next day the wind having 

 changed to west the temperature rose to 70°. After the 17th, 

 north-east winds were prevalent ; but the sky was generally 

 overcast till the night of the 29th, and then the radiating 

 thermometer indicated 2° of frost. The mean temperature of the 

 month was 2|^° below the average. Nearly the usual quantity of 

 rain fell. The 1 1th was boisterous, with hail showers in the 

 forenoon and thunder in the afternoon. Thunder was also heard 

 on the 12th and 17th. 



June. — This month was cold and exceedingly wet. Want of 

 sun-heat occasioned the mean maximum temperature to be 

 upwards of 4^° below the average ; but the temperature at night 

 was not correspondingly low, radiation being greatly prevented by 

 the cloudy state of the atmosphere. Tliere were only four days 

 in which rain did not fall, namely the 22nd and 23rd, and the 

 last two days of the month. The total amount was nearly three 

 inches in excess as compared with the usual quantity for the 

 month. Nearly an inch and a half fell on the ninth alone. In 

 three preceding months the wind was for sixty-two days either 

 from north, north-east, or east ; but in the present month it was 

 from none of these points. On the contrary, it was for more 

 than half the day in the month from south-west. The barometer 

 averaged low, yet it was not in any instance particularly so. 



