670 SALADS. 



celery which has been only slightly earthed up will stand through an 

 ordinary winter with little or no protection. 



Talcing the Crop. The plants should be dug up without being 

 bruised, beginning at one end of a row ; and afterwards, the roots and 

 green points of the leaves being cut off, and the loose outer leaves re- 

 moved, the heart of the plant in a compact state is fit for being sent to 

 the kitchen ; but if intended for market, or to be sent to a distance, 

 the outer leaves should be kept on, and also the root, excepting the 

 fibrous part. 



Celeriac is cultivated with greater ease, and at less expense of 

 ground and manure, than the common celery ; and it may be used in 

 the kitchen for seven or eight months in succession. The times of 

 sowing are the same as for the other sorts, and the plants should be 

 pricked out in a similar manner. They should be divested of all side- 

 slips, not only before transplanting, but also during their after growth. 

 Early in June they may be finally transplanted in rows fifteen inches 

 apart every way, into flat beds of very rich light or sandy soil, with 

 two-feet alleys between, to admit of watering the plants. The routine 

 culture here consists chiefly in liberal waterings, and in slightly earth- 

 ing up the roots after they have swelled to their full size in order to 

 blanch them. The celeriac has a continual tendency to revert from 

 the knob-rooted form to that which is natural to it ; and hence, like 

 the turnip and similar plants of culture, it will not attain any large 

 size if much earthed up. Still the celeriac, to be eatable, requires to 

 be blanched, and therefore must be earthed up to a certain extent, but 

 the less the better. The roots of the celeriac may be taken up on the 

 approach of frost, and preserved in sand or soil, like potatoes, for an 

 indefinite period. The London market used formerly to be supplied 

 with this root from Hamburgh. 



Diseases, Insects, $c. The celery is liable to the canker in some 

 soils, and also to be eaten by the maggot of the celery-fly (Tephritis 

 Onopordinis, Fab.), which is hatched in the leaves, and may be de- 

 stroyed as soon as these have a blistered appearance, by cutting them 

 off, and bruising or burning them ; or fetid substances may be fre- 

 quently sprinkled near the plants, as a preventive. 



To Save Seed. Select the finest specimens of the variety to be pro- 

 pagated, in February or March ; and either remove a part of the soil 

 with which they have been earthed up, and allow them to flower 

 where they stand, or transplant them to a more convenient situation. 

 The seed will ripen in September, and will keep ten years. 



The Lamb's Lettuce, Burnet, the Garden Cress, Winter Cress, 

 American Cress, and Water Cress. 



The Lamb's Lettuce or Corn-salad (Valerianella olitoria, Dec.) is a 

 valerianaceous indigenous annual, very hardy, and which requires no 

 other culture than sowing in August, September, and February, and 

 thinning the plants to three inches apart. The leaves should be 

 gathered singly, like those of spinach, when of full size ; except when 



