DISCUSSION OF THE HORIZON T A L C O M P X K N T 



The larger disturbances having been excluded, new monthly means were taken, 

 and the process was repeated several times, when required, until all readings differ- 

 ing 33 scale divisions or more had been excluded ; the final means constitute the 

 normals as given in the following table: 



i The mean of 17 Jays, 



The mean of 19 days. 



