FERTILIZERS WITH LETTUCE. 61 
‘¢3. Every 100 pounds of tomato fruit takes from the soil 
approximatelv : 
Ounces. Ounces. 
Nitrogen. ..... 2.2 Equivalent to Nitrate of soda 14 
Phosphoric acid .. 0.9 : ** Dissolved bone black 5 
CSS. ee ae 4.5 i. ‘* Muriate of potash Io 
‘4, It is possible to grow a crop of forcing-house toma- 
toes, amounting to two or more pounds per square foot of 
bench space, perfectly normal in size, color, taste and 
chemical composition, by the aid of commercial fertilizers 
alone, and in soil composed of coal ashes and peat.”’ 
The Connecticut experiments with lettuce. — Experi- 
ments like those detailed for the tomatoes were also made 
upon lettuce. Four plots (numbered from 38 to 41) of 
Simpson White-seeded and Tennisball varieties, each con- 
taining about 11% square feet, received each 200 pounds 
of the peat and ashes mixture (containing 5 per cent of 
peat). The bed was filled to a depth of 6 inches. Some 
of the details of the test are as follows: 
Fertilizers applied. Plot 38. Plot 39. Plot 4o. Plot 41. 
Nitrogen .... 7.11 grams 11.80grams 16.59grams_ 21.34 grams 
Equivalent ni- 
trate of soda 44.4 74.0 e 103.7 ue 133-4 ‘ 
Phosphoric acid 6.80 ‘“ 6.80 ‘ G86., > 680 ** 
Equivalent dis- 
solved bone 
black: ¢:. = « «4010 S 40.0 40.0 i 40.0 RS 
Botasii’o<%s ... 24.24 as 24.24 “ 24.24 ‘ 24.24 ‘ 
Equivalent mu- 
riateofpotash 48.5 <s 48.5 * 48.5 : 48.5 “ 
Crops harvested. 
Lettuce Heads . 1232.8 7 2217.6 <=) 2720.6 oe S062. 5 “ 
Lettuce Roots 
(with much ad- 
hering soil). . 219.6 : 361.3 “~~ ~368°4 ere AaO8:5 oe 
thotale. "So 3 < 5 1452.4 == 2578-9 ** 3089.0 Be ERE GEC 
Dry substance of : 
CLO eins 3s 205.5 ee 346.2 * 349.56 “ 355.53, wie 
“The facts which this experiment has developed may 
be summarized as follows: 
