230 PICTURING MIRACLES 



aration leave little profit. I am hoping that all those 

 interested will in this way be enabled to carry on 

 their own experiments. 



Just what this method of plant culture without 

 soil or cultivation really means is hard to conceive 

 a three by four foot tank could supply a small fam- 

 ily with potatoes, in California two crops yearly. The 

 average city dweller in the so-called "back yard," 

 perhaps thirty feet square, could raise all the vege- 

 tables and flowers needed. The same thing could be 

 done on flat roofs. Any soil is as good as the best for 

 this method where tanks may cover rocks, ash heaps 

 or what not, and it also gives a new and interesting 

 occupation. Insect pests are not as injurious to 

 healthy growing plants as to those struggling to ab- 

 stract sustenance from poor soil; and when the 

 "hang" of it is really learned the possibility of larger 

 crops and blossoms is excellent. Watching plant 

 growth is almost as much pleasure as that of your 

 own children's. There are certain to be some fail- 

 ures, but also much success. 



DETAILED INSTRUCTIONS FOR SPECIAL PLANTS 



For Potatoes 



Potatoes that gave a yield of from two to four 

 thousand bushels per acre, figuring on the square 



