CHEMICAL FARMING 233 



each. They were planted 12" apart each way, each 

 tank having two rows of tomatoes and a very narrow 

 passageway between them. Tomatoes in March were 

 retailing then at twenty-five cents a pound. In De- 

 cember when the plants were then a year old, they 

 had grown across the ceiling and down and were 25 

 feet long, still covered with green and ripe tomatoes, 

 although rather small at that time. Each plant was 

 supported on a half-inch iron pipe clear up to the 

 ceiling and then across and down. Each cluster of 

 tomatoes was so heavy it had to be supported also, 

 there being from five to eleven tomatoes in a cluster. 

 Tomatoes requiring an acid solution, it was neces- 

 sary to add solutions of diluted sulphuric acid occa- 

 sionally and also the iron rust, the quantities deter- 

 mined only by your judgment. Again the growing 

 period was not shortened, taking just as long in the 

 greenhouse as they would have in soil in a green- 

 house. 



In growing turnips, beets, radishes, carrots, and 

 that type of vegetable, none of the results were espe- 

 cially successful. In other words, no larger crop was 

 procured than would have been in soil. Considerable 

 more experimental work will have to be done before 

 I could recommend working with them. Onions did 

 quite well. 



