32 



THE NBW METHOD 



fore many hours. Nimbus clouds are rain clouds 

 and they are down lower than the other kinds. 

 Sometimes there are fair weather clouds over the 

 nimbus clouds and much higher up. Through an 

 open place in the sky I saw a small cumulous cloud 

 up very high above the storm cloud." Mary. 



"This is a bright beautiful morning. There are 

 cumulous clouds up about forty degrees high, and 

 stratus clouds twenty or thirty degrees above the 

 horizon. Both are fair weather clouds and it will 

 not storm until we have some nimbus clouds. 



"We had some interesting experiments at ten 

 o'clock to show that there is carbon in sugar. Car- 

 bon is the same as charcoal, and we saw it taken out 

 of the sugar." Ida. 



The Cassis Ruea. 



" The Cassis rufa is a very handsome shell. It is 

 very large indeed. It has the aperture on the face, 

 like all the Cypraea shells that we have studied. 

 The aperture is very large. It is a little more than 

 three inches long, and the teeth are in the inside of 

 the aperture farther than in Cypraea shells. The 

 back of the shell is covered with nodules of a grayish 

 brown color, while the shell is red and white or 

 orange and white. The very top is more of an orange 



