PROTECTION FOR CUTTINGS. 
55 
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. 
