140 MARKET GAEDEXI^s'G. 



to be done by candle ligbt, and, being done in narrow 

 passages, the operation covers many miles ; the beds of 

 one French cultivator, if placed in single line, would 

 reach about twenty-six miles. The beds rest upon the 

 rock bottoms of the galleries, and are built in the form 

 of a rido-e, two to three feet wide and two feet hiofh. 

 The limestone formation beneath Paris seems to be more 

 especially adapted to mushroom culture than the rock 

 formation in many other districts, coal and iron, in the 

 rock soil, for instance, preventing the best growth of 

 the mushroom. 



CHAPTER XXI. 

 EooTS FOR Stock Feedixg. 



This chapter is written in the hope of diffusing 

 information inducive to greater attention to a most val- 

 uable adjunct in husbandry, and, if more widely re- 

 garded, calculated to increase, not only the quantity, 

 but the quality, of our food ; the tender, luscious mut- 

 ton of the English, being attributable not alone to their 

 cooler climate, but to the turnip, and, we may add, other 

 succulent roots on which the sheep are fed and fattened 

 for the butcher. 



The value of succulent food, in a hygienic or san- 

 itary view, to man, and also to the animals which min- 

 ister to his wants, need not be commented on. All who 

 have paid attention to the subject agree in opinion as to 

 its advantage, indeed, its absolute necessity, if the preser- 

 vation of health be properly studied. The long winters 

 of our country, which arrest vegetation, and oblige us 

 to provide green food to be stored up in anticipation of 

 the severe season^ have necessarily induced inquiry and 



