hole full ^tSfrlng ] which was bored that time Twelve-Moneth before J 
and yielded not any fap atallthac «ypw^, as far as could be obferv'd , 
and was not come to its feafon of bleeding the fecond Sfring , when the 
Jelly was obferv d in the bor'd hole '^. 1 he latter^ of ^ 
the Walnm not bleeding but in cold weather, being in- '^'^* 
confident with the Obfervations , often made by me 
of that Tree, not only bleeding and bleeding longer in warmer wea- 
ther, bHt bleeding longer at the roots on the South-fide in the Sun, 
than on the North- fide in the Shade , and conftantly governing the 
Courfe of its Sap in its beginning to rife and to ftop daily at the ri- 
fing and fetting of the Sun • I fhall betake my felf , inftead of opining, to 
make fome naked Series for the finding out the matter , vU. 
1. Whether this Obfervation of Mr. Willoughhfi concerning the 
Wdnut-Tne^ was in Roots, Body , Branches •, all, or fome, or one ? 
2. Whether the Sap of a Tree, as to its motion, be not influenced 
from the Full or Wane, or other Afped of the Moon to the Sun, (^(7 ? 
3. Whether the Walnut ^ being a more folid Wood , have not fome 
alteration as to heat , afcent of Sap , &c, from thence different from 
Birch ^ 
4. What the Age and Bulk of the Tree, confuming perhaps infenfibly 
what rofe infenfibly in hot , not in cooler Weather ? 
5. What the time of the Year? The run only, asM. Mi^ford 
relates , before Fehrmrj ; the Hcpp about Hopp-harveft. withies in 
Afril, &c. 
6. Whether the weight of the Atmo-fphere will put fome check to 
Sap rifing in that part of the Root , which is cut off from the Body ? And 
w^lether the exclufion of that Imped ment , by clofing the cut Root in 
Glafs , will caufc any, fenfible alteration : to be tried in feveral Roots of 
the fame Tree of like Diameter. 
lvjd.nt^ goo&Thermomfter, Barometer^ zni Jrljgro- meter ^ (or if you 
will have Englift Names for them, a Heat-Weight-and-Wet-WiferJ to 
make more accurate Obfervations , how far the afcending oi S?p depends: 
on the Air , and the feveral temperatures of the fame, . 
An ExtraEl cj a Letter 
^r^V^f^^^j Francis Willoughby EJqmretothe FMifisr^ co»taimngfome 
Ohfervatims of his made on fome Sycamore-Trecs , the Black-Poplar, 
and the Walnut : As alfo his thoughts about the Dwarf- Oaks, and the 
Stellar Fifh ^f/rr/^^^/» Numb. 57. 
I Am forry, I cannot return you abetter A nfwer to yours of March 
19 the Experiments, which our leafure hath fince permitted us 
to make , being not fufficient to found a new Hjpothefis on , to 
