180 CONVERSATIONS ON 



"What is it?" 



" Why, the fly walks on the wall over our 

 heads ; now the air cannot press down upon 

 his feet there." 



" Very true, boys : it cannot press down^ but 

 it can and does press up against his feet ; for 

 the air presses up and down and sidewise all 

 alike." 



" Ah, now it is plain enough, and we are 

 much obliged to you, Uncle Philip, for telling 

 us what we wished to know." 



" You are quite welcome, my dear boys, to 

 all that I can teach you : if it makes you to 

 be wiser and better men when you grow up, I 

 shall be very thankful to GOD that I have 

 been able to do you any good." 



" Good morning, Uncle Philip." 



" Good day, boys ; I shall expect to see you 

 all in church to-morrow." 



" We shall be there, Uncle Philip.' 



