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Kayisas Academy of Science. 



unnatural combination of the four possible elements. There 

 would thus result a somewhat intermediate form. This seems 

 to be the case, as one may judge by ordinary observation of the 

 specimens submitted. 



2. EXPERIMENTS IN OSMOSIS OF LIQUIDS. (Fig. 4.) 



We had often tried this experiment and had never had the 

 tube long enough. Assisted by Mr. Clifford Hall, a student in 

 the department, we tried to see how far the liquid would rise 

 under the conditions of the experiment. 



For a membrane we used the skin of an ordinary egg. The 



14 16 18 20 21 22 24 26 28 



Figure 4. Osmosis test. 1 unit vertically = 5 cm. 1 cui. horizontalh' = 1 day. 



shell was removed by immersion of the egg in 25 percent hy- 

 drochloric acid overnight. Care was taken to keep the egg 

 covered by the acid by holding it under with a test-tube held 

 in a clamp. The end of the egg thus treated was cut off with 

 a razor, the contents removed, and the membrane washed in 

 water. To contain the sorghum, a thistle tube with a short 

 tube was used. The sorghum was full strength, and was the 



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