35 



These boxes are made of alder, birch, pine, and other woods which 

 do not split easily. 



The most important thing next to the characteristic slope of the 

 opening at an angle of 4 degrees is undoubtedly the pointed form of 

 the trough. Strange to say, this most important circumstance is 

 frequently misunderstood. A mistake of this kind, such as speaking 

 of a flat trough, can only be the result of insufficient acquaintance 

 with the Berlepsch nest ing- boxes.* (See p. 30.) 



A. B. 



EXTERIORS OF BERLEPSCH's NESTING-BOXES. 



A. With entrance hole opposite batten. 

 B. With entrance hole at the side. 



The cover and the batten consist of oak J inch thick, and, as the 

 illustration shows, the former is fastened to the box by screw bolts. 

 The batten is provided with a hole for a nail above and below the box, 



* In one of the first editions of the " Gesammte Vogelschutz " the word " flat " 

 was wrongly printed for " pointed " trough. We must assume that this mistake 

 was copied by those who were not acquainted with woodpecker holes, and that 

 the error was thus spread. 



c 2 



