Botanical Notes. 109 



material used to bring about osmosis. The cup of the thistle 

 tube was filled with the syrup, the membrane slipped over it, 

 and this supported by a piece of ordinary white cotton cloth. 

 The cloth and the egg skin were then firmly tied with string. 

 Connection was made to the rest of the tubing by means of 

 rubber tubing. In order to have the proper height the experi- 

 ment was set up in the hallway of the Science Building. The 

 water used amounted to 1550 cc. As this became sufficiently 

 colored to indicate the presence of syrup to a noticable degree, 

 it was replaced by distilled water. The thistle tube with the 

 membrane on it was immersed in the water 7.5 cm. This was 

 on July 14, 1915. 



The results in tabular form follow : 



Date. Hour. Height of water iu cm. 



July 14, 1915 (?) 0.0 



July 15, 1915 8:30 a.m. 250.0 



July 15, 1915 10:00 a.m. 263.5 



July 16, 1915 12 :00 m. 340 . 1 



July 17, 1915 9:00 a.m. 389.0 



July 17, 1915 4:40 p.m. 408.0 



July 19, 1915 10:00 a. m. 487.4 



July 20, 1915 7:10 a.m. 520.2 



July 20, 1915 6:00 p.m. 532.2 



July 21, 1915 12:00 m. 551.6 



July 22, 1915 12 :05 p. m. 570 . 5 



July 23, 1915 2:00 p.m. 582.7 



July (?) 1915 (?) 589.8 (19 ft., 4.2 in.) 



Our conclusion is that under these conditions the water will 

 likely rise about 20 feet in the tube. It certainly is a striking 

 experiment to show to pupils. This attracted much attention 

 and helped to acquaint people with this fundamental principle 

 in the economy of living things. We shall probably try it 

 under different conditions. 



3. THE RESTRICTED RANGE NOTED FOR PARONYCHIA 

 SESSILIFLORA NUTT., IN KANSAS. 



While doing some work for the State Biological Survey of 

 •the University of Kansas the writer noted what seemed to him 

 a remarkable case of restricted environment. Work was be- 

 gun that year (1911) on the 5th of July, in Logan county, at 

 Oakley, on the Union Pacific. After working several weeks 

 alone, we were joined by Mr. Orville Wilson, now of the 

 liotany department of the University of Cincinnati. The 



