168 Otto Herman : 



entering on a detailed exposition of the method. So I shall 

 only touch on the essential points. 



We must work out the myriad data recorded in literature 

 methodically according to space and time and draw from the 

 average figures thus obtained the conclusions relating to the 

 progress of migration ; so much for the past. The new 

 observations must be carried out at all points uniformly and 

 worked out, year after year, according to the same even 

 method. 



But you will ask me, whether I am able to point to the 

 practicability of the method ? I answer, in the case of our 

 Hungarian method, certainly. I shall, therefore, abide by 

 the Swallow ; and the question is now, what do we know of 

 the spring-migration of the Chimney Swallow in Hungary ? 



In 1898 more than 5900 masters of elementary schools, and 

 other men also, decided to observe the arrival of the Chimney 

 Swallow and to report the results of their observations to the 

 Hungarian Central Office. These observers, covered the 

 area of Hungary very well. They sent in their data on 

 special post-cards ; the points of observation were geo- 

 graphically determined and then schematized on particular 

 maps, each day separately. In such a way we obtained 54 

 day maps, each with as many dots as there were points of 

 observation. The result was : Beginning of the migration, 

 March 10th, 3 points ; culmination, March 30th, 343 points ; 

 end, May 2nd, 15 points. 



Let us give here some of the concrete forms : — 



1. — Address Side of the Post-Caed. 



Portómentes az 1897. évi 76.783. szàmù kereskedelcmugyi minisztcri rondelet alapjân. 



»J Magyar 



Ornithologiai Központ 



BUDAPEST 



VIII., Nemzeti Muzeum. 



