Page:Transactions of the Provincial Medical and Surgical Association, volume 2.djvu/86

 discrepancy between the different seasons at the two places. Thus it is seen that while the summer temperature of the district is rather more than 2° lower than that of London, the winter temperature is very nearly 5° higher. The spring temperature of both places differs less than one degree, and that of autumn is 2° in favour of the Landsend. It thus appears that while the winter is much warmer than that of London, the summer is considerably cooler; the autumn is as much warmer as the summer is cooler, while the spring is nearly equal at both places. The temperature of the whole spring at Penzance, as taken by the thermometer, is, indeed, rather higher than that of London; still it will be observed, on referring to the tables, that this superiority is derived almost entirely from the month of March, the temperature of April being very nearly the same in both places, while that of May is more than a degree and a half lower at the Landsend.

The singularly small range of the thermometer in this district, gives rise to a remarkable difference in the relation of the temperature of the day and night, here and in some inland places; in summer the nights being as much warmer as the days are cooler, and in the winter both the nights and days being warmer. This will appear in a striking manner by comparing together the mean of the extremes, i.e. of the highest and lowest degrees of temperature, as shown by the register thermometer during the two seasons, at London and Penzance.