32 CIIANBEKRY CULTUKE. 



expensive amount of drainage. The soil of gum-swamps 

 seems to favor the production of more grass than any- 

 other swamp lands that we have prepared for the vines. 



"It is, however, a good sign to find gum-trees in abund- 

 ance, growing at the heads of streams, and all their small 

 tributaries, as it promises an abundance of spring water 

 that may be needed further down the valley." 



For the purposes of cranberry culture, it is always es- 

 sential that swamps be surrounded by sand coarse sand, 



Fig. 6. SECTION OF SWA.MP. 



if possible, it being less liable to pack than that which is 

 finer. The section, fig. 6, shows a swamp favorably situ- 

 ated. 



SAVANNAS, or ground lying between swamps and 

 upland, are ofttimes turned to good account, but they 

 contain a diversity of soils, which renders their selection 

 a matter of care. 



For instance, we not unfrequently find in them heath 

 ponds containing muck, ridges of black sand, and knolls 

 of white sand. A Savanna is represented in section in 

 figure 7. 



