64 Bird Hunting on the White Nile. 



affected by the great heat, and were, moreover, defective 

 in the making as regards the emulsion. For this 

 ruinous defect the maker deserves to be named. Such a 

 defect could, of course, be guarded against by testing 

 each batch of films before starting, but the fogging due 

 to the heat cannot be avoided. I think it wise to 

 mention this because, although I am well aware that 

 films are often perfectly successful in very hot climates, 

 they are as often not, and the successes are well 

 advertised while the failures are seldom reported. Half 

 the number of plates in such a climate would be more 

 certain to yield success if very carefully packed than 

 twice the number of films. 



Only the common and boldest birds came down to 

 the tin of water to drink and be photographed. Of 

 these a species of Bulbul,** a bird a little larger than 

 a Robin, with a black head, a brown back, and a white 

 breast, was the most confiding and usually the first to try 

 the experiment. One or two of these birds were always 

 in the trees over our camps, and their pleasing flute-like 

 notes, almost exactly syllabled by the words " tit-willow," 

 were continually to be heard. 



** Pycnonotiis arsinoe (Hempr. et Ehr.). 



