maggot within must be crushed by pinching the blister between the thumb
and finger. Leaves that are much blistered should be removed and burned,
but to rob the plants of many leaves will seriously reduce the vigour of
growth.

==Celeriac==, or ==Turnip-rooted Celery==, is much prized on the Continent
as a cooked vegetable, and as a salad. In ordinary Celery the stem forms
a mere basis to the leaves, but in Celeriac it is developed into a knob
weighing from one to five pounds, and the root is more easily preserved
than Celery. When cooked in the same manner as Sea Kale, Celery is well
known as a delicacy at English tables, and the cooked Celeriac ranks in
importance with it, though it affords quite a different dish. The stem
or axis of the plant is used, and not the stalks. To grow fine Celeriac
a long season is requisite; and therefore it is advisable to sow the
seed in a gentle heat early in March, and afterwards prick out and treat
as Celery; but after the first stage the treatment is altogether
different. For the plantation a light and rich soil is required, and
where the staple is heavy, a small bed can easily be prepared by
spreading six inches depth of any sandy soil over the surface. The
plants must be put out on the level a foot and a half apart each way,
and be planted as shallow as possible. Before planting, trim carefully
to remove lateral shoots that might divide the stems, and after planting
water freely. The cultivation will consist in keeping the crop clean,
and frequently drawing the soil away from the plants, for the more they
stand out of the ground the better, provided they are not distressed.
They must never stand still for want of water, or the roots will not
attain to a proper size. The lateral shoots and fibres must be removed
to keep the roots intact, but not to such an extent as to arrest
progress. When a good growth has been made, and the season is declining,
cover the bulbs or stems with a thin coat of fine soil, and in the