16 On the MOTION of 



COR. 8. The motion of the fap then is accelerated by the per- 

 pendicular pofition of the branches ; a leading facl, not only 

 in the motion of the fap, but in the ftruclure of the veflels 

 which convey it. And from which at prefent we may thus 

 far conclude, that the motion of the fap of trees is not the 

 fame with that of fluids in capillary tubes, as has been gene- 

 rally thought, but defcends with a greater force than it afcends; 

 and confequently its motion muft depend upon fome different 

 principle. 



COR. 9. From this experiment we may likewife infer, that the 

 fap makes its way fooner, and in greater quantity, to the extre- 

 mity of pendent than of erec~l branches. Hence the reafon 

 appears, why the gems upon pendent branches always burft 

 fooner than upon thofe which are in an upright pofition. 

 And it is probably alfo for the fame reafon, that moll fruits 

 are of a brifker growth, and of a larger fize, upon thofe 

 branches which hang down, than upon fuch as are eredl. 



OBS. 15. In the branches, A, B, C, D, to which the fkp had 

 now afcended, we remarked a\confiderable alteration in the 

 buds, though very little change had been obferved in them 

 for fix weeks before. They now began to fwell, and their 

 fcales to fhoot from under one another ; but the buds upon 

 the fuperior branches, to which the fap had not yet afcended, 

 were not fo fwelled, but compact as formerly. 



MARCH 25. 



Thermometer, at noon, 42. ; at midnight, 34. 

 Continued fun-mine all day. Thermometer, in the fun, atnoon,63. 

 THE ninth incifion continued to bleed, but all the fuperior in- 

 cifions were dry. 



OBS. 1 6. The inverted branch D E continued this day to bleed 

 at the fe&ion E, while the branches B and C, placed be- 

 low it, but in their natural pofition, were only moift at their 

 extremities. 



OBS. 17. 



