201 



A period placed in front of any number = "about." 



For each day's work afield I fill out one of these 'condition cards,' 

 one, in the majority of cases, giving sufficient space to record all 

 notes of the nature indicated on the card that are desired. In case 

 there is not sufficient space on this card to record all desirable 

 data with respect to 'Floral' and 'Faunal Changes,' these notes 

 are continued by the use of index letters onto an 'extension card' 

 as indicated in Fig. 1, cards 1 and 2. The 'Locality' on this 

 'condition card' is for the general locality over which I have 

 that day worked in distinction from the 'Exact Loc.' in which 

 any species may be found and recorded on the 'barred cards." 



These 'condition cards' are not essential to the system and 

 may be omitted at one's pleasure. Isolated notes taken when 

 going to and from business, or under other adverse circumstances, 

 cannot always be accompanied by notes of contemporaneous con- 

 ditions, but it is evident that, when the oppotunity is given to 

 make such observations, notes on the new insects and other small 

 animals that are about, the new buds and flowers that are out, etc., 

 should be recorded as a most valuable contribution to the study of 

 bird migrations. 



The 'barred cards' will also in the majority of cases be found 

 to contain sufficient space to accommodate the notes that should 

 be placed upon them. The spaces within the barred lines are 

 intended for numbers only. If one wishes to enter into descrip- 

 tions of 'Indications of Mating,' of 'Nest-building,' etc., or to 

 extend any note on the card not within the barred lines, it may 

 easily be done by the use of as many 'extension cards' as are 

 desirable, each being numbered consecutively. See Fig. 2, cards 

 1 and 2. 



