6 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I ID 



columns. Two additional lines give the number of values per column 

 and their mean values. To save printing, the first two places of the 

 solar constant are omitted. The reader must therefore remember that 

 where, for instance, "32" is printed, 1.932 is to be understood. 



Although, as stated above, about 20 storm dates had been omitted, 

 because the corresponding sequences of solar-constant values were too 



Fig. 2. — Depression of solar constant attending severe magnetic storms. 

 Abscissae, days before and after height of storm; ordinates, solar constant (to 

 be prefixed by 1.9). 



defective, there still remain many very incomplete sequences in the 

 table. I therefore thought it good, as I have said, to pick out a smaller 

 number of occasions when the sequences, especially those near zero 

 day, were nearly full. These selected dates, 22 in number, are indi- 

 cated by asterisks in the table. Their mean values and the numbers of 

 observations entering into these means, are given in the last lines of 

 table I. 



