by Green Plants from certain Organic Compounds. 153 



DlAGEAM NO. 1. 



water were placed in a cylinder containing the culture solution and 

 the seedling plaDts either in the same or in a cylinder containing 

 damp sand moistened with the culture solution. When it had been 

 found by testing portions of the tissues that the plants, &c, were 

 entirely free from starch, they were at once transferred to fresh 

 cylinders containing the different solutions and placed under other 

 bell-jars similarly fitted. 



The apparatus shown in diagram No. 1 and described on the next 

 page was always used in the first instance, but where positive results 



