58 



A MANUAL FOR NORTHERN WOODSMEN 



A. To refer the above tabular quantities to years subse- 

 quent to 1915: 



For year 1917 subtract 0.7 



1918 add 



1919 add 



"*>{: 



1921 add 



1922 add 



1923 add 



* {2! 



1925 add 



1926 add 



1927 add 

 1Q9R /add 



1928 ( add 



B. To refer to any calendar day other than the first and 

 fifteenth of each month, subtract the quantities below from 

 the tabular quantity for the preceding date. 



For the tabular year, two eastern elongations occur on 

 January 14, and two western elongations on July 13. 



C. To refer the table to standard time: Add to the tab- 

 ular quantities four minutes for every degree of longitude 

 th<- place is west of the standard meridian and subtract 

 when the place is east of the standard meridian. 



D. To refer to any other than the tabular latitude between 

 the limits of 25 and 50 North: Add to the time of west 



ation 0.10 in in. for every degree south of 40 and 



