480 M E M O I R S of tbe 
its former globular parts; and this will happen whenever it is 
cold again, tho' melted ten times or oftner. 
That venous blood may become arterious without being firft 
in the heart, appears by the following experiment ^ fuppofe 
A B in Fig. 30. to be a vein, in which the blood looked 
upon thro' a magnifying-glafs, pafles with great celerity from 
h to A; from this vein run two fmall branches G and D, 
which unite between E and Fj now luppofing HI to be an 
artery, in which the blood moves upwards with equal fwift- 
ncfs from H to 1 5 out of HI arifes a venous Ipring deli- 
neated in K F L 5 the blood moving from K to F joins the other 
in F j and by this means part of the blood coming from the 
artery is thrown into the vein, as paffing from F to G j and 
to the bell of M. Zeewefiboeck's obfervation, a quantity of 
blood jult equal to that carried from K F to G, moves from 
C £ to F, and directs its courfe upwards from F to L 5 fo that 
whatever arterious blood pafles thro' F K and F G, an equal 
quantity of venous blood returns thro' C£ and FL: I'ho* 
the agreeable variety of the blood's motion was formerly 
apparent 5 yet this experiment afforded M. Lee'iJCenhoeck a very 
clear perception of the above-mentioned variety 5 and befides, 
this union of the blood-veffels was not formerly difcovered. 
M. Leeivenhoeck viewed the feed of two cocks that were not 
yet arrived to their full growth, in order to trace, as much as 
poffible, the length and lingular narrownefs of the tails of the 
little animals in the male feed^ but he could not compafs his 
end, tho' he tried them fometimes living and fometimes dead 5 
however he is certain, that the lead of the tails of thofe ani- 
mals is more than loooo times lels than a hair upon his hand 5 
tho' he cannot fay that he faw it diltindly. 
Roman Antiquities in Lincoln/hire; hy 3/r. Abraham de la 
Pryme. Phil. Tranf. N° 2^3. p. 561. 
MK.de la 'Pryme obferved feveral Roman ways in Lincoln- 
fiirey but none more remarkable than that commonly 
called High-Street, which he thinks runs almoft directly in a 
ftraight line from Lincoln to Humber-fide-^ this ftreet is caft up 
on both fides with incredible labour to a great height, and dil- 
continued in many places, and then begun again, and fo on to 
the Humbei"^ he obferved, where it runs over bare mould and 
plain heath, that there itconfifls of nothing but earth thrown up, 
but where it comes to run thro' woods, there it is not only raifed 
with earth, but aUb paved with great flones fet edge-wife, fo 
very 
