148 SYLVA BOOK i 



himself, together with those other excellent enquiries 

 and observations, which he is adorning for the benefit of 

 planters, and such as delight themselves in those inno- 

 cent rusticities. I will only by way of corollary, hint 

 some particulars for satisfaction of the curious ; and 

 especially that we may in some sort gratifie those 

 earnest suggestions and queries of the late most ob- 

 liging l publisher of the Philosophical Transactions, to 

 whose indefatigable pains the learned world has been 

 infinitely engag'd. In compliance therefore to his 

 Queries, Monday, Octob. 19. 1668. numb. 40. p. 797, 

 80 1, &c. these generals are submitted : That in such 

 trials as my friend essay'd, he has not yet encountred 

 with any sap but what is very clear and sweet ; espec- 

 ially that of the sycomor, which has a dulcoration as 

 if mixed with sugar, and that it runs one of the 

 earliest : That the maple distill'd when quite rescind- 

 ed from the body, and even whilst he yet held it in 

 his hand : That the sycomor ran at the root, which 

 some days before yielded no sap from his branches ; 

 the experiment made at the end of March : But the 

 accurate knowledge of the nature of sap, and its peri- 

 odic motions and properties in several trees, should be 

 observed by some at entire leisure to attend it daily, and 

 almost continually, and will require more than any one 

 person's industry can afford : For it must be enquir'd 

 concerning every tree, its age, soil, situation, Gfc. the 

 variety of its ascending sap depending on it ; and then 

 of its sap ascending in the branches and roots ; de- 

 scending in cut branches ; ascending from root, and 

 not from branches ; the seasons and difference of time 

 in which those accidents happen, fife. He likewise 

 thinks the best expedient to procure store of liquor, 



i. Mr. Oldenburg. 



