224 PICTURING MIRACLES 



and entire plant yellowish. As the effect of iron soon 

 wears away, more must be added from time to time. 

 This can be done by mixing iron tartrate, iron chlo- 

 ride, iron rust, with water, perhaps every week, 

 enough to keep the plants a healthy green. As iron 

 tartrate is expensive, over $33 pound, it is as well 

 to use the other forms, they being much cheaper, 

 and having an equally good effect. 



This soilless culture being a technique to be pa- 

 tiently acquired, it is well to start in a small way. 

 My own experience soon showed me that it was use- 

 less to try to work with any small containers, the 

 plants growing so fast and drinking so much water 

 that it was very difficult to keep it at its required 

 level. When the plants are first placed in their tanks 

 or other containers, water should almost touch the 

 wire netting, and be kept at that level until the roots 

 grow into it, when the carton or bottle of chemicals 

 may be added, laying it on its side anywhere in the 

 tank. From the two small openings, holes, or tubes, 

 the solution will gradually seep out, and although 

 the water is apparently perfectly still, there is 

 enough circulation, due to the movements of the 

 growing roots, to equalize the distribution of the 

 Nutrient elements eddying it about to all points, 

 from the nearest to the farthest from the central 

 supply. 



