VOL. XIII.] PHILOSOPHICAL TRANSACTIONS. 623 



rising vessels. GGG are great rising vessels, whereof some appear to have 

 contained a fluid matter, which in drying seems to have closed them together 

 in several places, as II, fig. 15, where one of the vessels is plainly exhibited at 

 length. 



Fig. 16 is likewise one of the greater vessels, magnified more by a yet greater 

 glass, which was much more perspicuous than the former, beset also with ex- 

 ceedingly small parts. The 2d sort of rising vessels, which are placed generally 

 between the horizontal vessels ABC and HH, are likewise in many places partly 

 filled with black matter. The 3d sort of rising vessels, which follow the cir- 

 cumference of the tree, are B and CDE. The 4th sort of rising vessels are 

 those which go checkerwise between the great rising vessels. These vessels are 

 of a firm wood, in proportion to the vessels of other wood; for the small round 

 which is placed in the white is only the openness of every rising vessel, and 

 the white wherein the round is placed is the wood that forms the vessel ; and 

 these vessels are so close and firm joined to each other, that they seem to be 

 but one, as if we should imagine that small holes were bored regularly in firm 

 wood. 



Fig. 15, KKK are the horizontal vessels cut across through, of which I have 

 represented 2 in their length, fig. 14, ABC and HH. 



Fig. 15, LL are small rising vessels in their length, cut from each other. 



Fig. 17 is a piece of palm-wood, drawn by the same magnifying glass that 

 the Mauritius ebony wood was. Of this wood, though I examined a great deal 

 of it, I could find little diflTerence in the several parts, and therefore I have here 

 contented myself with describing a smaller portion. It consists of 2 sorts of 

 ascending vessels, viz. great vessels, and smaller ones lying among the larger. 

 The great vessels consist also of skins, being beset with small rising particles, as 

 in fig. 18, where the vessels are opened longwise, and represented by EEEE. 



The small vessels have their cavities very like those of the small vessels in 

 Mauritius ebony wood, and are described cut longwise in fig. 18, FF. 



AB or CD are the horizontal vessels, which in their length show themselves 

 thus, but being cut across they are as GG in fig. 18. 



Fig. 19, ABCDEFisa description of a very small piece of straw cut across, 

 in which the part of the circumference AF may be discerned how great it is. 



ABEF is the rind of the straw, which to outward appearance is smooth and 

 shining, though for the most part it is made of extremely small vessels, and of 

 some greater, which I have represented as near as possible. GGGG are the 

 vessels of which the innermost parts of the straw are made ; these vessels are 4, 

 5, and 6 sided, according as they come to fit themselves. HHH are other 

 vessels which run in between the forementioned ones, and are beset round with 



