l62 PHILOSOPHICAL TRANSACTIONS. [[aNNO 1704. 



I concluded the red sap passed, and that those many colours, which lay in those 

 canals, were a sort of bags, that contained the sap; and that the several colours 

 were wholly produced by the sap that oozed through the sides of the canals, and 

 so made the whole stalk red. 



Concerning Tobacco Ashes. By Mr. Antony Van Leuwenhoech, F. R. S. 



N° 293, p. 1740. 



The alkaline salt obtained from tobacco by incineration, is the same with that 

 extracted from the ashes of other vegetables which do not grow on the sea- 

 shore or under the sea ; and as the figures of these saline particles (as extracted 

 from other vegetables) have been already described in some of Mr. Leuwen- 

 hoeck's former papers, the reprinting of this letter is deemed wholly un- 

 necessary. 



Cuculus Lavis ccerulao JlavescenSy* cui in supremo Capite Bronchiarum Opercula; 

 or, the Yellow Gurnard. By Edward Tyson, M. D. F. R. S. N° 293, p. 1 749. 



If we may justly infer an identity of species in fishes from the likeness of 

 their fins, we have then some ground to conclude, that this fish ought to be 

 referred to the gurnard kind. Not but that in many remarkable particulars it 

 differed from it. However, not finding any other species it agreed with better, 

 and the fishmonger who sent it to the Royal Society not knowing its usual name ' 

 at Hastings, where it was taken, I shall call it the yellow gurnard, and in sup- 

 port of that appellation shall compare this fish.with the red gurnard, and show 

 wherein they agree or differ. 



In the general shape of their bodies I found sufficient similarity. In both, 

 the head was the largest part, the body thence gradually still lessening and grow- 

 ing taperer as it approached the tail, where it was very small in both. The yel- 

 low gurnard measured 1 1 inches in length, whereof the tail was 2 ; the girth of 

 the head was 4-^ inches. 



The fins as to number and situation were the same in both, I shall therefore 

 omit their description, and only notice wherein they differed in other circum- 

 stances. In the fore fin on the back of the yellow gurnard there were four or 

 five radii or spines, of which the first was 6 inches long, the next about 2, the 

 others shorter; but in the same fin of the red gurnard there were six strong 

 bony spines, sharp pointed ; whereof the second from the head, which was the 

 longest, was only a little more than an inch, and the rest not much shorter. 

 Note, my red gurnard was a small one, and rather less than the yellow one. 



* Callionytnus Lyra. Linn. 



