Bird Study for Busy People 21 



zontal lines start always at the same distance from the top of the 

 page, the name "Downy Woodpecker" will always correspond with 

 the first line, "Crow" with the second line, and so on, throughout 

 the twelve months. As I add more varieties to the list, the folder, 

 of course, becomes filled down to the bottom. I leave, however, a 

 space of one and one-half inches, as I want to make a weather 

 record at the foot of the column for each day. When this folder is 

 thus filled, I leave a sufficient number of pages to go with it, then 

 insert a second folder, and continue the list as before. My list of 

 last year ran out to the fourth folder. 



The weather and the temperature are important factors to be 

 reckoned with in bird observations. I think that the record at the 

 bottom of the daily column can be most profitably kept by some sys- 

 tem of symbols, of which a proper index should be written on the 

 iirst page. For instance, I use Arabic numerals to indicate the 

 weather, as — i. fair; 2. overcast; 3. cloudy; 4. light rain, etc., and 

 Roman numerals to indicate the force of the wind, as — I. none; 

 II. light: III. strong, etc. For instance, take this record — "H'f'd. 

 1-3 III. N. 28°-30°." This means that the record was made at 

 Hartford, that the day was fair, later becoming cloudy, that there 

 was a strong wind from the north, and that the lowest temperature 

 was 28°, and the highest 30° above zero. 



DIAGRAM OF TOP AND BOTTOM OF SPECIMEN PAGE 

 {Folder) i Pag^e) 



H'f'd. 

 3-t 



III. N.W 



H'f'd. 



II. S.E. 



-6°-i9° 



H'f'd. 



II. S.W. 



H'f'd. 



I rule my pages once a month, and, that once done, it rarely 

 takes more than five minutes to make out the record of each day. 

 It is easy to remember the new birds to be added to the list, while 



