528 



The Algse are especially useful in manuring land contiguous to the 

 sea, and the most valuable for this purpose is Laminaria Saccharina, 

 Agardh. — Kelp, or Devil's Apron. Next to this, perhaps, Fucus No- 

 dosus, L., and F. Vesiculosus, L., Ulva Lactuca, &c. &c. 



