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Periscope. 445 lowest temperature of the month in Dublin was recorded on the night of the 20th, when--the air being dry, calm, and clear--the sheltered thermometer fell to 40 ~ and the exposed thermometer almost to freezing point. On the night of the 23rd hoar-frosts occurred over central England. The last four days of the month were warmer. On the 29th a well-marked depression advanced over Ireland and England from the Atlantic, causing a heavy rainfall with thunder and lightning at manydoi:10.1007/bf02970734 fatcat:azci3mj6gfcqxchkqdcnmc3iom