HORTICULTURE. 405 



"(3) Every 100 lbs. of tomato fruit t.ikcs from the soil ;iu])roxim;itnly : 



Omici's. (uuccs. 



Nitrogen _. 2.2 ImiuI valeiit to iiitratr of soda 11 



Pbosi(liori(- acid 0. <) •' ■• dissolved liouo lihuk 5 



Potash 4.fi " " ]iiuriato of potash 10 



"(4) It is i)0ssible to grow a crop of I'oreiug-hoiiso tomatoes, aiiioimtiiig to 2 or 

 more pounds per square foot of bench space, perfectly normal in size, color, taste, 

 ar.d chemical composition, by the aid of commercial fertilizers aloni^, and in soil 

 I'omposed of coal ashes and i)eat.'' 



On the chemical composition of lettuce grown in the forcing 

 house, E. H. Jenkin.s and W. E. Bkition [Connecticut ^Statc ^Sta. Rpt. 

 l\')'>,2)p. 93-95). — All experiment similar to tlie above with tomatoes 

 was made with lettuce, but extended notice is to be deferred until fur- 

 ther tests are completed. Some data which are thought to have inde- 

 pendent value are given. 



Beds containing 11.6 sq. ft. were tilled with a mixture of 190 lbs. 

 anthracite coal ashes and 10 lbs. peat moss, and plants of Simpson 

 White Seeded Tennis Ball lettuce were set 8 in. apart each way. At 

 harvest the lettuce heads were cut close to the surface of the soil, 

 weighed, and dried for analysis, and the roots separated as mcU as 

 possible from the soil and analyzed. Tables show the amounts of ferti- 

 lizer applied and crop harvested, composition of fresh plants, and fer- 

 tilizer ingredients taken up by crops. The authors give the following 

 conciusions: 



"(1) Lettuce of good qnality can be grown under glass in an artificial soil such 

 as we have described with the use of commercial fertilizers. 



"We are not prepared to say at present that its (piality is as good as the l)est let- 

 tuce grown in rich, natu; al soil. 



"(2) A crop of forcing-house lettuce raised as above descrilied takes from the 

 soil in roots an<l heads, per 1,000 heads, not less than : 



(iraiiis. roiiiul.s. Oiimes. 



Nitrogen 282.6 Eciuivaient to 3 15 nitrate of soda. 



Phosphoric acid 87.7 " '' 1 2 dissolved bone black. 



Potash (521.0 " " 2 10 muiiato of potash. 



"(3) To supplj' this plant food to the soil under the conditions of our ex]>erimeut, 

 it was necessary to add to the soil the following ([uantities of fertilizers per 1,000 

 plants, or per 387 sq. ft., the area used in our experiment for 1,000 plants: 



Fvrtilizcr.i requind by 1,000 Itttace plaiils. 



Total . 



The use of artificial soil and commercial fertilizers in forcing 

 houses, V^. H. Jenkins and W. E. I>ritton [Connccticnt State >Sta. 

 Bpt. 1895, pp. 91, 92). — In counectiou with the experiment with tomatoes 



