WIND W GA RDEX1XG 



159 



the only successful means for obviating the effect of the dry heated air of our 

 dwellings. They are reached by no dust, are free from the noxious exhalations 



of coa! fires or gas lights ; and when a breath of cold air accidentally enters the 

 room they are nol chilled nor frosted if the thermometer in the room should chance 



