New York AGRrIcULTURAL EXPERIMENT STATION. 465 
in Soil 1, and it decreased in the other soils in proportion as the 
amount of sand was increased, but, as will be shown later, it is 
safe to assume that the soils were on equal footing so far as a 
sufficient supply of nitrogen, phosphoric acid and potash is con- 
cerned, because even Soil 3 had a supply far exceeding the require- 
ments of the crop. | 
The plats in which these soil mixtures were tested were arranged 
on the south middle-bench and south side-bench of the lettuce 
house as shown in the diagram. Lach plat in the side-bench con- 
tained 20 plants. The plats in the middle-bench each contained 32 
plants. There were no pipes under the middle-bench, but the side- 
SouTtH MIDDL¥E-BENCH. 






Soil 1. Soil 3. Soil 2. 
~ Plat 18 14 15 16 17 18 
WALK. 
| | | Soil 3. | Soil 2. | Soil 1 | | | Soil 8. | Soil 2. | Soil | 
Plat12 11 10 9 8 v4 6 5 4 3 2 1 
SOUTH SIDE-BENCH. 
bench had two coils of 34-inch hot-water pipes underneath. A 
thin layer of sphagnum was spread over the perforated tile bottom 
to help retain the moisture and the benches were filled with 54 
inches of soil. In order to prevent any modifications of the re- 
sults of the test which might arise from checking the growth un- 
equally in transplanting, the seeds were planted where the plants 
were to stand till they reached marketable condition. Selected 
seeds of Salamander lettuce from Peter Henderson & Co., New 
York, each weighing 1.5 milligrams were planted 2 of an inch 
deep and 8 inches apart in the row, in rows 8 inches apart, each 
seed being planted opposite the middle of the space between the 
seeds in the adjacent rows. This gave a distance é6f almost 9 
30 
