PLATK XLIII. 



OOLOGICAL IXSTRUMENTS, ETC. 



In this plate are figured various instruments used in the collecting of birds' 

 eggs. The egg drills arc made with octagon handles six inches long as represented 

 in Fig. 1. The sizes of the burrs, as will be seen in P^'igs. 1 to (i, range from 3-32 

 inch to 16-32 inch. These can be obtained from any dealer in naturalists' supplies 

 at the following prices, as already quoted on i)age 140 : 



Egg drill Xo. 1, 3-32 inch hurr SO 25 



" 35 



" 50 



" 75 



" 1 00 



" 1 50 



1016, common, siiort 20 



Blow-pipe, No. 7 25 



Embryo hook, No. 8 25 



