232 



PHILOSOPHICAL TRANSACTIONS. 



[anno 1751. 



LFIIl. Observations of the Weather in Madeira, made by Dr. Thos. Heberden, 

 and communicated by Wm. Heberden, M.D., F.R.S. p. 357. 



The thermometrical observations are made with Fahrenheit's thermometer, 

 and the calculations deduced from 2 observations daily ; at 7 o'clock in the morn- 

 ing, and at 3 in the afternoon. The same method of calculation is to be under- 

 stood of the barometer. The rain fell through a funnel J 5 inches in diameter. 

 The Lestc, Levant, or hot winds, are very troublesome. The remedy is, to 

 keep within doors. October 1749, comparing 2 of Fahrenheit's thermometers 

 together, one of them exposed on the north side of his house to the open air, 

 the other within doors, the difference was as follows: 



Hour, 

 Lest6, Oct, 20, 10, 12, 4 



Madeira, Anno 1749. 



Therm, within-doors. 



73, 7^, 77 



Therm, exposed to the air. 

 81,82,77 

 Anno 1750. 



An Account of the quantity of Rain, which has fallen in the Island of Madeira. 



The Years 1749 and 1750, were such 

 dry years, that the corn was destroyed, and 

 the fruit-trees suffered much, particularly 

 the peach-trees, the fruit either falling to 

 the ground while green, or, if it remained 

 longer on the tree, being full of white 

 worms. 



