EGG-DRILLS, 

 f 



for the smallest e^<ys — even of hnmmino^birds — and 

 up to warl^lers, sparrows and those say of a thrush. 

 The grooves forming* the drilled surface should iDe 

 cut with a cliisel. The second size will suit the gen- 

 erality of eggs, excepting those. of very large birds 

 and of sea-foAvl , which usually lay eggs with a strong 



Fig. 3. 



but soft shell. The grooves may be cut either Avith 

 a chisel or a file, luit if with the latter, greater care 

 w^ill be requisite in its use. A third size is intended 

 for the largest eggs, and even some of the smaller 

 ones which have a chalk}^ shell, such as CrotopJiaga, 

 The grooves are cut with xifile; in the manufacture 

 of all these drills the greatest care is necessary that 



