490 PHENOLOGICAL OBSERVATIONS IN NOVA SCOTIA 



latter case, the average will be the " region " phenochrons. 

 When a full sheet can be made out for each belt, the averages of 

 the phenochrons for the three " bells" will give the phenochrons 

 for the " region " 



Blanks. 



" There is a convenience in averaging the dates of the ten 

 stations, which accounts for the ten columns for stations in the 

 form within. When a few dates are not given, it may be fair 

 to enter in the blanks the dates from a similar neighboring 

 station which is not otherwise utilized for the sheet. Gieat 

 care should be taken that such observations taken from a 

 schedule not summarized should appear to be what might have 

 been observed at the station indicated in the heading; and to 

 indicate such a transference the date should be surrounded by 

 a circle with the pen, which will always mean that the obser- 

 vation was not made in the station heading the column, but in 

 a neighbouring one, and was taken from a supernumerary 

 schedule." 



Thunder-storms. 



" These dates will be entered in their respective columns and 

 opposite the month indicated. They will not be averaged, of 

 course." 



A ccuraci/. 



"Care must be exercised in selecting schedules, the observa- 

 tions of which appear to have been carefully made, neglecting 

 any which give reason for doubt, when selecting for summation 

 on the form within. Great care must also be exercised in 

 copying the figures and entering them, so that no slip may 

 occur. Every entry should be checked. One slip may spoil the 

 effect of all the accurate numbeis entering into the summation. 

 In like manner, great care has to be taken in adding and aver- 

 aging the figures ; and for this purpose every sum should be 

 done twice in reverse order, so as to give absolute confidence in 

 the accuracy of the work." 



