CXXIV ROYAL SOCIETY OF CANADA 
to combine two belts, or if necessary, the three belts on the form within. In 
the latter case, the average will be the ‘region ” phenochrons. When a full 
sheet can be made out for each belt, the average of the phenochrons for the 
three “ belts ’’ will give the phenochrons for the “ region.” 
BLANKS. 
There is a convenience in averaging the dates of 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 and neighbouring station which is not otherwise utilized for the sheet. 
Great 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 would always mean that the 
observation was not made in the station heading the column, but in a neigh- 
bouring 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. 
ACCURACY. 
Care must be exercised in selecting schedules, the observations of which 
appear to have been carefully observed, 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 numbers entering into the summation. In like manner, great care 
has to be taken. in adding and averaging the figures; and for this purpose 
every sum should be done twice in reverse order, so as to give absolute con- 
fidence in the accuracy of the work. 
REMARKS. 
The compiler filling one of these blanks should keep one copy for himself 
while sending the other to the compiler-in-chief. 
The set of stations on the right, under “‘ when becoming common,” must be 
exactly the same as on the left, under “‘ when first seen.” 
Phenological Observations, Canada, 1901. x 
This table takes note of merely the date of the first appearance 
of each phenomenon; and there are only the dates of individual 
observers given in each column, except the column for Nova Scotia, 
where the number (fraction omitted) is a phenochron derived from 
several up to 450 individual dates. 
