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THE AM Kin (AX NATURALIST [Vol. XLIII 



formed an overhang over one of the chambers, and, together with 

 o, p, q and r, served to support the glass roof-panes, one cover- 

 ing chamber A, the other chamber B. v was made half an inch 

 longer at each end than t and u, the projecting ends resting on o 

 and p to which they were fastened, thus giving the tray addi- 

 tional rigidity. As in the Fielde nests, the necessary ventilation 

 and tightness of roof were secured by using strips of Turkish 

 toweling, which were glued to the upper surfaces of o, p, q, r 

 and v. All cracks in the corners and around the partition w r ere 

 stopped with putty. In one chamber a wet sponge was kept, and 

 in the other food. Either chamber, or both, could be darkened 

 by pasteboard covers placed on top of the roof-panes. 



2. Traveling Case. — In order still further to diminish the 

 weight of the outfit, and render it more convenient in traveling, 

 certain modifications were made in the Fielde (1904, p. 28) 

 traveling ease. For part of the plan and all the construction I 

 am indebted to my mother. The case (Fig. 3) was made as fol- 

 lows : The floor, roof and ends were made of wood three eighths 

 inch thick, each composed of a pair of strips two inches wide, 

 placed parallel to each other and two inches apart. Four strips 

 of heavy tin, about six inches broad and as long as the width of 

 the floor (about six inches) were bent at right angles, like 

 " angle irons," to form the corners of the case where the ends 

 met floor and roof. The strips were nailed securely to the tins, 

 leaving the desired space of two inches between the strips of 

 each pair. The case was twenty-one and a half inches long, six 



