1032 
Journal of Agricultural Research 
Vol. XXXI, No. 11 
The averages for the determinations made in 1922 4 show that all 
six of the Egyptian varieties have a higher chloride content than the 
Meade Upland cotton grown as a control, and that in both the first 
and second series of determinations the chloride content of the Pima 
Egyptian plants is slightly higher than that of any other Egyptian 
variety. 
Because of certain analytical difficulties, the determinations based 
on the plants grown in 1924 must be regarded as only approximate. 
They indicate clearly, however, that all of the Egyptian varieties 
have a higher chloride content than either Sea-Island or the three 
Upland varieties included in this experiment. 
In another place the writers have shown (7) that the sulphate 
content of the leaf-tissue of Pima Egyptian cotton is lower than that of 
the Meade or Lone Star varieties of upland cotton. Determinations 
on the sulphate content of other Egyptian varieties, made by the 
method of Gortner and Hoffman (£), are available for the experiment 
of 1924 only. 5 6 The determinations must be regarded as more or less 
approximate. They show clearly, however, that the sulphate 
content of the Upland varieties is higher than that of any of the 
Egyptian varieties considered, and higher than that of Sea-Island 
cotton. 
Table V. —Comparison of the sulphate content (in terms of grams of SOi per li'er) 
in Egyptian, Sea-Island, and Upland cotton, as grown at Sacaton, Ariz., in 1984 
Determinations made in 1924 
Variety 
First partial 
series 
Second partial 
series 
First whole 
series 
Second whole 
series 
N 
Mean 
N 
Mean 
N 
Mean 
N 
Mean 
Egyptian: 
Ashmuni, Ei_ 
8 
10.14 
8 
8.58 
12 
10.44 
13 
8.93 
Zagora, E 2 _ 
8 
9.92 
6 
10.14 
12 
10.02 
12 
10.26 
Sakel, E 3 _ 
8 
10.15 
8 
10.01 
12 
10.41 
14 
10.19 
Pelion, E 4 _ 
8 
9.91 
7 
9. 33 
12 
10.09 
11 
9.28 
Assili, Es_ _ 
8 
10.44 
7 
9.64 
12 
10.35 
10 
9.81 
Pima.__ _ 
8 
10.34 
8 
9.32 
10 
10.29 
13 
9.70 
Sea-island_ 
8 
9.95 
7 
10.08 
8 
9.95 
10 
10.42 
Upland: 
Acala_ 
7 
11.61 
8 
11.08 
8 
11 . 61 
11 
12.00 
Meade_ 
8 
11.89 
8 
12.04 
8 
11.89 
11 
12.80 
Lone Star_ 
8 
13.00 
7 
13. 38 
7 
13.00 
10 
13.73 
SUMMARY 
The purpose of the present study has been to determine whether 
Pima Egyptian cotton, a variety of American origin, is unique in that 
it is different from at least some of the Upland varieties in the physico¬ 
chemical properties of the leaf tissue fluids as shown in earlier in¬ 
vestigations (3, 4 , 5 , 6 , 7), or whether all of the varieties of the 
Egyptian type differ from those of the Upland type of cotton. 
The constants here considered represent, in addition to Pima, five 
Egyptian varieties grown from seed imported from Egypt in 1922. 
These are Ashmuni, Zagora, Sakel, Pelion, and Assili. 
4 The determinations of the chloride content of the samples of this series were made by Dr. and Mrs. 
John V. Lawrence. 
6 The analytical work on this series has been done by Clara T. Hoffman. 
