36. Preserving Eggs.—As eggs are produced in large numbers in spring and summer, it is desirable to preserve them for winter use. They may be kept good for many weeks by closing the pores of the shells, by rubbing them with a little melted lard as soon as they are laid, or they may be packed in a vessel and a mixture of freshly-slaked lime in water, mixed to the thickness of thin cream, poured over them. This method will keep them, if fresh when laid down, for many months, but it unfortunately renders the shells very brittle.