(^91-) 



found, in order to fliew, as accurately as pofiiblc, tlie inake and tex- 

 ture of this wood, when viewed by the inicrofcopc. 



Fig. Q, OPQR, reprefents a very fmall particle of the Cocoa 

 wood, cut tranfverfely, and magnified, wherein are to be fecn fix of 

 the larger of the perpendicular vefiels, two of which, furrounded 

 by a great number of fmaller veflels, are to be feen at T T. Of 

 thefe larger and fmaller veflels, the capillary or hairy parts I have 

 mentioned, and which are very tough and ftrong, are compofed. 

 But thefe vefiels do not all afcend in an exa6t perpendicular direc- 

 tion, but creep upwards in a kind of oblique courfe, one among ano- 

 ther, by which pofition they contribute to tiie flrength of the tree. 

 And when one of thel'e vefiels or threads divides itfelf, each divided 

 part, though it prefents tlie figure of a fmaller filament, is yet in 

 truth a perfe6l vefiel. Theie fmaller vefiels, intermixed with 

 the larger ones, I have caufed to be rejjrefented in the drawing. 



Thefe larger vefi"els feem connefted together by a kind of 

 veficles, whicli, I imagine, while the tree is alive and flourifiiing, 

 are filled with fome kind of liquid. Thefe veficles are not difpofed 

 in any orderly or proportionate manner, but in fome places they 

 may be feen heaped together to the number of five and twenty, and 

 in other places, between two capillaments, will be found only a fingle 

 veficle. 



Such of thefe capillaments as are next to the bark of the tree, 

 are exceeding fmall, in comparifon of thofe nearer the middle ; 

 and, to exhibit them to the reader, I cut ofi' a piece of the wood 

 next to the bark, and caufed it to be drawn from the microfcope, 

 which drawing is copied iitjig. 3, ABC D. In this figure, A D is 

 an innermofi: bark next the w'ood, being a very thin fkin, and the 

 capillaments next to it are the I'malleft of all, whereas tliofe more 

 inwards, grow larger and larger. But, though thefe innermofi cap- 

 pillamems are the largefl, they are fiiU compofed of thofe exquifitely 



