Small variations in the cost of manufacture 
(including the cost of leaf), which do not ex- 
ceed 10%, are usually borne by the manufac- 
turer, and do not affect the price to the con- 
sumer. But increase in taxation, either in- 
ternal revenue or tariff, usually occasions a 
diminution in consumption as it invariably in- 
creases the cost. 
THE DISEASES OF TOBACCO DUE TO INSECT 
PESTS, ETC. 
Tobacco, from the seed bed to the storage of 
the manufactured products, is subject to at- 
tack by insects, etc., and vigilance must at all 
times be exercised to keep it free from such 
harmful influences. : 
Only a few of the principal agencies attack- 
ing tobacco will be mentioned here as the sub- 
ject is of more interest to the specialist than to 
the smoker. The growing plant is particularly 
subject to Cut-worm disease and Horn-worm 
disease. Cut-worms are the larvae of several 
species of moths. They injure the young, ten- 
- der plant and feed on the leaves. Horn-worms 
are the larvae of the Sphinx Moth. 2 or 3 will 
ruin a plant in one day. 
Stored tobacco is subject to many diseases. 
Bud caperpillars, the leaf-miner or split-worm 
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