CIRCULATION AND CONVECTION IN GASES. 63 



Inasmuch as our comfort so largely depends on the efficient warming 

 and ventilation of rooms, it is much to be desired that the application 

 of the principles of convection should be more thoroughly studied. The 

 investigation on the scale necessary for its application to large buildings 

 is expensive as well as difficult, and for this reason, probably, it has 

 hitherto been too much neglected. But whatever the expense, it would 

 be worth incurring if we could thereby arrive at some mode which 

 should save us from the too common experience in large buildings, where 

 the means provided for ventilation and warmth are found to be totally 

 inadequate, and where improvement of ventilation means increase of 

 draught, and increase of warmth means absence of ventilation. 



