THE COTTON ZONE OF THE WOELD. 
17 
in whicli the isothermal lines range from 60° to 80° and 
upward. We have indicated the northern and southern 
limits by broad, black lines. The northern line is the 
isotherm of 60° north of the equator ; the southern line is 
the isotherm of 60° south of the equator. 
Cotton can be raised to some profit, though not very 
large, on these lines ; but we regard it as a waste of time , 
and money to attempt its culture in any region where th^ > 
isotherm falls below 60°. / 
We here subjoin a few extracts from the reports fi^^ 
American consuls in various parts of the world on the^.sv|)!^ k 
ject of the production of cotton. ^ ?^ 
1st. Alexandria, Egypt. — There are three species oV"^- 
cotton cultivated in Egypt. 1. The native, of very in- 
ferior quality, used in domestic manufactures, but never 
exported. 2. The Maho or Jumel cotton, which consti- 
tutes the great bulk of Egyptian, and is grown all through 
the Delta. It is a long-stapled cotton. 3. The American 
Sea Island, which has been cultivated in small quantities 
for the last fifteen years, but which has not had a great 
success. It will degenerate. 
The annual product of cotton in Egypt is about 
50,000,000 lbs. It is exported chiefly to Great Britain, 
France, and Austria. 
The soil and climate are adapted to the profitable cul- 
ture of cotton ; but the yield depends greatly on the rise 
in the Nile, as no rain falls except in December. The only 
fertilizer of the soil is the alluvium of the river. The seeds 
are sown in April ; the plant begins to flower early in July, 
and continues flowering until January; and the crop is 
gathered in September and October. The average product 
is about 250 lbs, per acre. 
The cotton is very little injured by insects, the chief 
