SAFETY CONTRIVANCES. 51 



now universally practised, though he used a three- 

 edged needle to punch the hole, instead of our mod- 

 ern drill, and did not refer to some of our late ways 

 of managing the embryos. I refer to the paper less 

 as a matter of history, than for the purpose of bring- 

 ing to notice one of the tools which M. Danger 

 recommmends, and which I think would prove very 

 useful indeed. In fact, I am rather surprised that it 

 has been so long neglected, and strongly advise a 



Or 



Fig. ii. 



trial of the instrument as something better than fin- 

 gers for holding the egg during drilling and blowing. 

 The instrument is so simple that it will be under- 

 stood without description, by a glance at the accom- 

 panying figure (fig. 12) . The oval rings are covered 

 with some light fabric, like mosquito-netting, and do 

 not touch the egg which is held lightly, but securely 

 in the netting. Such an instrument would cost but 

 a trifle, and it seems worth ascertaining whether we 

 may not avoid danger by Danger's own method." 



