PROTECTION FOR CUTTINGS. 65 



rays of the sun effects a material purpose. Linen is the best 

 shelter in the world from heat, but oiled or horn paper resists 

 rain better. 



Dr. Priestley is of opinion that salt water is very efficacious for 

 cuttings, if they are placed in it for a few days previous to plant- 

 ing. He remarks that it is a custom with the importers of exotic 

 plants to dip cuttings in salt and water, otherwise they would 

 perish on the passage. 



