affecting the Corn- Crops. 
93 
an artificial cold atmosphere by means of ventilators, a sure 
remedy is effected. This is easily done by making small windows 
in all directions, near the floors of the storehouses, which will 
supply the current of air required. If the tubes be introduced 
through the closed windows, one end being carried into the corn- 
heap, a draught will be created which will at cmce reduce the tem- 
perature sufficiently to attain the desired object; or the tubes 
may be laid in the floor with the end rising a foot above it. and 
covered at the top with a perforated rose, like that of a watering- 
pot : over these the corn must be thrown, to receive the cooled 
draught thus created. 
Fumigation has been also recommended by M. Granier, who 
explained his method of preserving corn for long periods before 
the Academy of Sciences at Paris. " The corn was well win- 
nowed, and put into a vessel or room perfectly free from damp ; 
the external air was excluded, and then sulphuric acid was intro- 
duced by means of burning sulphur within, as is done in this 
country for whitening peeled wicker-wares. If many insects 
should be found to be destroyed by this method, pulverised char- 
coal should be mixed with the corn, to obviate the effects of putre- 
faction. M. Garnier had kept corn six years perfectly good by a 
renewal of this operation once a year."* It is, however, positively 
stated that fumigation with brimstone has been found of no use, as 
it only induces the larvae to bury themselves deeper in the corn- 
heaps. 
Sprinkling the corn with common salt is considered very bene- 
ficial : indeed Roesel says that salt powdered and mixed with the 
corn will kill the larvae, or it may be dissolved in water and 
sprinkled over it; and it will not in any way injure the corn, as 
brimstone, wormwood, «Scc., do, by communicating a disgusting 
flavour. When there is room, it is a simple and successful plan 
to form a small heap of a bushel or two of corn near the centre 
or the part most affected, and leave it undisturbed, whilst all the 
rest is to be turned over repeatedly, which will compel the larvae 
to take refuge in the small undisturbed heap ; and by pouring 
hot water over it, the insects can be readily destroyed : many will, 
no doubt, climb up the walls, but these can be swept off. 
I must not omit to notice some interesting observations made in 
the • Introduction to Entomology,'! showing the extent to which 
this moth is multiplied in our granaries, and the serious conse- 
quences that might arise from neglecting to take timely measures 
for its extirpation. It is true that the facts m some degree con- 
travene the modes that have been recommended to expel this pest ; 
* Literary Gazette, Aug. 1, 1840. 
t By Kirby and Spence, vol. i. p. 140, 6th ed. 
