erected during winter, and totally removed after the end of 

 the frosts in spring. A thousand pounds so expended would 

 produce a far greater result than three thousand applied in 

 the common manner ; and the annual cost of keeping such 

 houses in order would be nothing as compared with the ex- 

 pense of greenhouses and stoves. 



This is one of those perennials with succulent, fingered 

 roots which multiply sparingly. It is chiefly to its seeds 

 that we must look for the means of propagating it. 



