480 PHYSIOLOGY AT THE FARM. 



Gelidium, one species of which is supposed to be the species 

 used in constructing the famous Chinese condiments. Iridea 

 edulis is used as food in Scotland and in the south-west of 

 England. Laurencia pinnatifida, pepper dulse, is eaten in 

 Scotland. 



Laminaria saccharina yields upwards of 12 per cent of 

 mannite. L. digitata also contains mannite. L. potatorum is 

 used as food in Australia. L. bracteata in Asia is used as 

 food. Nostoe edule is used as food in China. Other species 

 of nostoe are edible one in the arctic regions, another in Cen- 

 tral Asia. 



Plocaria tenax and P. Candida are eaten among Indian 

 nations. P. compressa affords carageen. 



Porphyra, vulgaris and P. laciniata are eaten after being 

 dressed, under the name of marine sauce or slouk or slowcan. 



Rhodymenia palmata, the dulse of the Scotch, the dillesk of 

 the Irish, is edible. 



Cattle readily eat these and other sorts of seaweeds. 



Sargassum acanthocarpum and 8. pyriforme belong to 

 Asia, and are used as food. 8. cuneifolium is also so used in 

 the Sandwich Islands. Scytosiphon filum is part of the fodder 

 for cattle in Norway. 



Such is a brief account of the vegetable productions that 

 have been ascertained to afford nourishment in any degree to 

 animal nature. To draw a line between those that are suit- 

 able for the farm animals and those fit only for man is not 

 easy. No one can predict how soon any of the rarest sub- 

 stances spoken of above may become in the highest degree 

 available for the uses of feeding on the farm. 



