on tite Climate of the Canary Islands. 10 i 



the other islands, rises only slowly, but now ascends rapidly, and 

 reaches such a height as is only found in the warmest tropical 

 climates. The fact is indisputably established, by the observa- 

 tions of Dr Bandini de Gatti in Las Palmas^ made for ten years, 

 with good and properly placed thermometers, which he commu- 

 nicated to me, and from which I have reckoned the decades for 

 three years. It is to be regretted that M. Bandini observed only 

 at midday, and thus the true mean temperature cannot be oh- 

 tained. In order, however, to bring it in some respect near the 

 truth, I have applied the difference between the mean and mid- 

 day temperature, as obtained from Don Francisco's observations, 

 to those of Bandini ; the difference, however, must certainly be 

 greater in Las Palmas. The result is as follows, 



Las Palmas in Grand Canary. 



Mid-day. 



Fahrenheit, 

 Means by 

 calculation. 



Mid-day. 



Fahrenheit. 

 Means by 

 calculation. 



January 



1. to 10, 

 10. to 20. 

 30- to 31. 



63.81 

 63.77 

 63.25 



62.19 

 62.15 

 61.63 



February 1. to 10. 

 10. to 20. 

 20. to 28. 



63.61 



64.51 

 64.49 

 65.05 



61.99 



63.54 

 63.52 

 64.06 



July 



August 



1. to 10. 

 10. to 20. 

 20. to 31. 



1. to 10. 

 10. to 20. 

 20. to 31. 



74.10 

 75.74 

 75.99 



72.45 

 74.10 

 74.34 



75.27 



77.49 

 77.99 

 78.48 



73.63 



75.72 

 76.21 

 76.71 



March 



April 



May 



June 



1. to 10. 

 10. to 20. 

 20. to 31. 



1. to 10. 

 10. to 20. 

 20. to 30. 



1. to 10. 

 10. to 20. 

 20. to 31. 



1. to 10. 

 10. to 20. 

 20. to 30. 



64.68 



65.66 

 65.75 

 66.49 



63.71 



64.44 

 64.53 

 65.28 



September I. to 10. 

 10. to 20. 

 20. to 30. 



77.99 



80.53 

 81.95 

 83.75 



76.21 



79.14 

 80.55 

 82.35 



65.97 



67.12 

 67.75 

 67.68 



64.75 



66.06 

 66.44 

 66.40 



October 



1. to 10. 

 10. to 20. 

 20. to 31. 



82.08 



86.00 

 86.27 

 84.00 



80.68 



84.69 

 84.96 

 82.69 



67.52 



68.85 

 69.75 

 69.90 



66.30 



67.55 

 68.45 

 68.67 



69.53 



70.65 

 71.60 

 72.09 



68.22 



69.19 

 70.14 

 70.63 



November 1. to 10. 

 10. to 20. 

 20. to 30. 



December 1. to 10. 

 10. to 20. 

 20. to 31. 



85.42 



78.26 

 74.52 

 69.26 



74.01 



65.75 

 64.20 

 63.99 



84.10 



76.95 

 70.97 

 67.95 



71.96 



64.44 

 62.87 

 62.69 



71.45 69.99 



64.65 



63.33 



