of the Marine Alge, or Sea-Weeds. 349 
extremely valuable for that purpose ; and if the success which has 
attended the experiments already made with kelp, be confirmed by 
additional observations, the manufacture may still be regarded 
as ai important article of domestic commerce. It appears from the 
communications made to the Highland Society, that the past suc- 
cess has been such as to induce Lord Dundas to take a cargo of 50 
tons of kelp to Yorkshire, for the sole purpose of agricultural expe- 
riments. It has been tried singly, or in combination with other 
manures, on corn, pasture, potatoes, turnips, &c. and in most in- 
stances with decided good effect. The Committee appointed to 
collect the result of the experiments, are inclined to think, that for. 
raising green crops it would be better to compost it with other sub- 
stances. That with good earth or moss, and a little vegetable or 
animal manure, ‘ a few tons of kelp would enable a farmer to ex- 
tend his farm-dung over at least four times the usual quantity of 
land.’ A very curious circumstance is mentioned by Charles Mack- 
intosh, Esq. who tried the effects of kelp manure upon potatoes, at 
Crossbasket, near Glasgow. A severe frost which occurred in Sep- 
tember, injured and blackened every lot of potatoes to which the 
kelp had not been applied, while the kelp lots remained in perfect 
foliage, even when the respective drills were contiguous. It would 
appear that the soil, for the time being, had acquired a property 
equivalent to a certain degree of atmospheric temperature. 
Note and Correction io Dr. Knox’s paper on the Stomach of the 
Lama. 
Tue description of the third stomach, (p. 327.) drawn from the 
brief notes of the author, does not convey the idea which the struc- 
ture presents. Like the third stomach of the camel, it may be 
said to form a sort of rudiment of the king’s hood of other ruminants, 
except that the cells, instead of being polygonal, are formed by the 
intersection of longitudinal and transverse folds. Cuvier describes 
it as composed of “ longitudinal folds connected by other trans- 
verse folds, which disappear towards the end,’ (Anat. Comp. III. 
393.) It will be remarked that Cuvier thus considers this third 
stomach, and the fourth, which is distinguished by longitudinal 
folds, as only one. On the other hand, “ there is no separation 
whatever between them, (says Dr. Knox,) but the surfaces are per- 
fectly distinct ;” and hence he holds them to be two stomachs. But 
we shall return to this subject, in a general paper on the stomachs 
of ruminating animals, in a future Number. 
Instead of “‘ Both the fourth and fifth stomachs are characterized 
by longitudinal folds ; but there is a slight change of surface, and 
a positive contraction between the two stomachs,” read “‘ The 
fourth stomach is characterized by longitudinal folds; an evident 
change of surface, and a positive contraction distinguish it from the 
fifth or true digesting stomach.”—Ep, 
