90 TEE SEA SHOBE 



(albo-carbon) put into the various compartments, and renewed 

 occasionally as they disappear by evaporation, will generally suffice 

 to prevent the entrance of all pests, but this substance is not 

 effectual as an insecticide for the purpose of killing them after 

 they are in. 



Perhaps the best of all insecticides is the corrosive sublimate 

 already mentioned, and this may be applied to any animal or 

 vegetable object that is capable of providing food for museum pests, 

 and it is difficult to find such an object on which they will not feed. 



Many of the specimens that find a place in a museum have 

 been temporarily preserved in spirit previous to being dried, and 

 if a little corrosive sublimate was dissolved in this spirit, the speci- 

 mens will have been rendered perfectly free from all attacks of 

 marauders, since the spirit will have saturated the whole object, 

 carrying with it the dissolved poison. 



Most of the specimens that have not been treated by the above 

 method would not suffer from a short immersion in spirit containing 

 the corrosive sublimate; but in cases where it is considered in- 

 expedient to do this, the same liquid may be applied to them by 

 means of a soft brush. In this way even the dried botanical 

 specimens may be rendered perfectly secure from attacks. 



