DEEP OB SHALLOW SETTING. 249 



the depth of the dish have on the arrangement of the 

 sand? It will be found that the particles of sand 

 will arrange themselves according to their gravity or 

 size as soon as the vessel comes to a rest. In the 

 shallow dish the strata of sand thrown down will be 

 somewhat mixed. If the other dish be sufficiently. 

 deep, the sand will be exactly graded and arranged 

 with the heavier particles, or those which sink first, 

 placed accurately at the bottom and the lighter par- 

 ticles at the top. 



In deep setting of milk we have similar conditions, 

 only reversed. The globules acted on by gravity 

 arrange themselves in order, and the deeper the jar 

 in which the milk is set, the more regularly will the 

 globules arrange themselves according to size, from 

 above down. In the shallow setting we have a 

 greater mixture of the different sizes of globules in 

 the same space than in the deeper setting, and the 

 deeper the setting, the more completely would the 

 globules be arranged in order according to size. 

 Such being the physical effect, the question now 

 arises, What effect will occur in practice from having 

 cream of such different churning quality at different 

 depths? for it will be remembered that the size of 

 the globule has a strong influence on the churning. 



Let us seek another illustration in the form of 

 various sizes of shot. If we place a gill of coarse 

 shot in a bowl, we can add a considerable quantity 

 of fine shot without any increasing of bulk, as the 

 fine shot will occupy the interstices between the 

 larger pellets. So with the globules of the cream : 



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