9 



on proved ; consequently we may say that the chimney-swallow 

 on her spring journey from South to North travels so to say with 

 the spring. 



This was the original, purely ornithological method, which, 

 though void of some phaenological conditions, nevertheless proved 

 that Middendorffs ,,Wust" (chaos) may be worked out methodi- 

 cally, especially if the data at hand from one and the same year 

 are worked out according to a uniform method, that is, if these 

 data are turned into migration -elements and combined com- 

 paratively, as is quite naturally done with the exact elements, the 

 figures and time-data, that serve as a basis. 



Present method. 



The result of the meteorologist Jacob Hegyfoky's joining the 

 Hung. Central Office was the further development of method in 

 the form of a uniform ornithological and meteorological schemati- 

 sation, observation and working out, the principles adopted being: 



1. Observation of the first appearance and last visibility, as 

 formerly. 



2. Two systems were put in action, one consisting of pro- 

 fessional ornithologists, the other of schooled foresters. 



3. |The latter had only to notify the movements of the chim- 

 ney-swallow and the stork, the ornithologists of everything. 



4. The data coming in were looked through critically and 

 turned into elements in the following way : 



836 1901 Manuscriplura a 



D. Kaygorodoff 



CUCULUS CAN OHUS 



Mai 11. 1901 



Lat. sept. 6148' 

 Long, ab Ferro 6831' 

 Alt. 50 in. 



Ust Syssolsk 



Rossia 



