160 FRENCH MARKET-GARDENING 



butter, added to the whiting, lime, or chalk will 

 make the liquid adhere more firmly to the glass, and 

 will not wash off with the first shower of rain. 



The varieties of Cos Lettuce sown at this period 

 are the " Dwarf Frame Cos " (known as Plate d cloches) 

 and the " Paris Market Cos " (Grise maraichere). The 

 last-named kind is chiefly useful for planting between 

 the cloches that are covering plants of the first-named. 



A well-known variety of Cos Lettuce, called " verte 

 maraichere" or " Green Paris Market Cos/' is not now 

 grown so largely by the market-gardeners of Paris as 

 formerly, chiefly because it has failed to realise the 

 best prices in market. It is, however, hardier than 

 either Plate a cloches or the Grise maraichere, and in 

 cold or bleak localities it may still be regarded as a 

 profitable, and even desirable, crop. 



Early in September, the seedlings will have developed 

 two or three young leaves. They are then carefully 

 pricked out under cloches, so as to be ready for planting 

 in their final quarters in October. About twenty-four 

 or thirty young plants are usually pricked out under 

 each cloche, as shown in the diagrams (figs. 37-8). 

 Early in October one Cos Lettuce is planted under each 

 cloche, and not more than one, if the very best plants 

 and prices are desired. Air is excluded for a few days 

 after planting, and shading from strong sunshine may 

 be necessary with mats, but once the plants have 

 taken hold of the new ground, air may be given freely 

 on all fine days more than is usually given to Cabbage 

 Lettuces at the same period. 



At the beginning of November hot-beds should be 

 prepared for Cos Lettuces that are to be " cloched." 

 These beds are made of the hottest and best manure, 



