SAFETY CONTRIVANCES. 49 



piece should be left to dry before the next is gummed 

 on. Slits in their margin cause them to set pretty 

 smoothly, which will be found very desirable : an 

 aperture in the middle of each may be cut out first, 

 or the whole series of layers may be drilled through 

 when the hole is made in the egg. For convenience' 

 sake the papers may be prepared already gummed, 

 and moistened when put on. Doubtless, patches of 

 linen, cotton cloth, or "court-plaster," would an- 

 swer equally well. When the operation is over, a 



Fig, io. 



slight application of warm water will loosen them so 

 that they can be easily removed, after which they 

 can be separated from one another and dried to serve 

 another time. Some of the instruments, very ser- 

 viceable in this and the previously described delicate 

 operations, are shown in fig. 7 which explain them- 

 selves. The "hooks" of course have knife-blade 

 edges on the inside of the curve. 



The most effectual way of adopting this method of 

 emptying eggs is by using veiy many layers of thin 

 paper and plenty of thick gum, but this of course is 



