VOL. HI.] PHILOSOPHICAL TRANSACTIONS. 205 



I conceive, to those parts which, being homogeneal, symbolize together with 

 the nature of the more perfect, whereby the pure metalline parts are separated 

 from the other heterogeneal impure sulphurs, which together with other causes 

 hindered nature in the mine from concocting that substance into the more per- 

 fect metal. 



Obse7vatio?is in Jamaica. By Mr. NoRwooDr Jan. iV" 41, p. 824. 



Aligators are shaped and they walk like lizards. Those of a full growth have 

 teeth like a mastiff, and a mouth a foot and a half wide. The smell of them 

 is so strong that it is felt at a great distance. They may be mastered and killed 

 by any one dextrous and skilled in the way of doing it ; which is, that a man 

 be armed with a long truncheon, and fall upon them side- ways; fordoing it 

 front-ways they are too nimble for the assailant, and may by leaping upon him, 

 which they can do the length of their whole body, overpower him ; but if he 

 strike them with his club on their shoulder, and behind their fore-feet, and 

 lame them there, the beast being thereby rendered unable to move, is easily 

 subdued. 



Tortoises die if their blood be heated ; as their blood must not be hotter than 

 the element they live in. The chegoes are not felt till a week after they have got 

 into the body. They breed in great numbers, and inclose themselves in a bag, 

 which when observed, there are certain skilful persons, who with little pain 

 take them out ; taking care to extract the whole bag entire, that none of the 

 brood, which are like nits, be left behind. 



The shining flies are a kind of cantharides, looking green in the day time, 

 but glowing and shining in the night, even when they are dead ; this relator 

 affirming, that he has applied them dead to a printed and written paper in the 

 dark, and read it. 



The Manchinel apple is one of the most beautiful of fruits to the eye, the 

 most agreeable to the smell, and pleasant to the taste, and thence called the 

 Eve-apple; but if eaten, it is certain death. The wood of it yet green, if rubbed 

 against the hand, will fetch off the skin, or raise blisters ; and if any drops of 

 rain, falling from this tree, light upon one*s hand or other naked part of the 

 body, it will also have the same effect. 



An Account of two Booh. N'' 41, pp. 833, 6fc. 



1. Tractatus duo, prior de Respiratione, alter de Rachitide, A. Joh. 

 Mayow,* &c. Oxon. l668, in 8vo. 

 • Ab an account of the life and opinions of Dr. Mayow was published only a few years ago by a - 



