Mr. H. E. Strickland oti the Geology of Asia Minor. 137 



Norwich. [The construction of the several gauges is dif- 

 ferent, and many of them have not been tested either by 

 weighing the collected water, or by accurately measuring the 

 vessels in which it is received. At Walworth Crosley's self- 

 registering gauge is used, which, after being in use a short 

 time, does not truly register the fall, and it should not be de- 

 pended upon solely in any case.] 



Columns 12 to 16 contain the mean hygrometrical results, 

 and they are nearly identical at most places; at Beckington, 

 however, the air seems to have been very nearly in a state of 

 saturation during these three months, if the instruments be 

 good by which the observations were made; they have not 

 however been compared with standards. The degree of hu- 

 midity in the Vale of Aylesbury is greater than that due to 

 its latitude, and this seems to be decided, as the results at 

 three different stations agree very well together. 



Those results from the station in Ireland, depending on the 

 temperature of the air, the direction and strength of the wind, 

 and the amount of clouds, agree with those in England at 

 the same latilude, but those depending on humidity of the air, 

 and on the amount of rain, exhibit an excess over those in 

 England. 

 January 27, 1848. 



XXI. On the prese?it state of knowledge of the Geology of 

 Asia Minor. By H. E. Strickland, F.G.S.* 



IN the last Number of the Journal of the Geological Society, 

 part 2, p. 74, is a letter from M. von TchihatchefF, ex- 

 tracted from Leonhard and Bronn's Neues Jahrhuch, 1847. I 

 rejoice to find from it that this gentleman is about to undertake 

 a systematic geological survey of Asia Minor, a country which, 

 from the magnificent scale on which its secondary and tertiary 

 rocks are displayed, and the wonderful diversity of its volcanic 

 jihaenomena, i,s probably inferior to none of equal area in 

 geological interest. Our knowledge of the geology of Asia 

 Minor is, in truth, comparatively limited, and we may there- 

 fore look ti:)r results of the highest value from M. Tchihat- 

 cheff's researches. But although mucii remains to be done 

 l)y the geologist in Asia Minor, yet we are not wholly without 

 information on this subject; and as it might be inferred from 

 M. Tciiihatclieff's silence as to the labours of others that such 

 was the case, I liave thought it desirable to give a brief sum- 

 mary of the progress that has already been made in this branch 

 of inquiry. 



• (Joiniiumicaleil by the Author. 



