494 . PHILOSOPHICAL TRANSACTIONS. [aNNO 1700. 



course upwards from f to l : so that whatever arterious blood passes through 

 FK and FG, an equal quantity of venous blood passes back throughcE and pl. 

 Though the pleasing variety of the blood's motion was formerly a()parent, yet 

 this experiment pleased me still more, as it afforded me a very clear perception 

 of the above-mentioned variety ; and besides, this union of the blood vessels 

 was not formerly discovered. 



I viewed the seed of two young cocks that were not yet arrived at their full 

 growth, in order to trace as much as possible the length and singular narrow- 

 ness of the tails of the little animals in the male seed. But I could not com- 

 pass my end, though I tried them sometimes living, and sometimes dead. 

 However I am certain that the least of the tails of those animals is more than 

 10000 times smaller than a hair, though I cannot say that I saw it distinctly. 



Concerning sow.e Roman Antiquities in Lincolnshire. By the Rev. Abr. de la 



Pryme. N° 203, p. 56 1. 



I have observed many Roman Ways in Lincolnshire, but none more observa- 

 ble than that called High-street, which I think runs almost directly in a straight 

 line from London to Humber-side. This High-street is so visible, that it is a 

 great guide to strangers and passengers. It is cast up on both sides to a great 

 height, and discontinued in many places, and then begun again, and so on to 

 Humber-side. I have observed that where it runs over only bare mould and 

 plain heath, that it consists of nothing but earth thrown up ; but where it runs 

 through woods, it is not only raised with earth, but also paved with great stones 

 set edgewise, so very close to each other, that the roots of the trees that had 

 been cut down to make way for the same, might not spring up again and blind 

 the road. This paved causey is still very strong, firm, and visible in many places 

 of this street, where woods are yet standing on both sides, as undoubtedly they 

 were in the times of the Romans, else it had not been paved ; and in some 

 other places it is paved where no remains of wood is now to be seen, though 

 undoubtedly there was when it was made. In one place I measured the breadth 

 of the said paved street, and found it just 7 yards broad, English measure. 



This street or causey, in its course full north, runs by the fields of Hubber- 

 stow, which perhaps signifies the place where the Danish General Hubbin was 

 buried ; in which fields, not far from this street, are the foundations of many 

 Roman buildings 10 be seen, as is manifest from their tiles found there, and 

 according to tradition there has been a city and castle in that place, and there 

 are two springs, the one called Julian's stony uell, and the other Caslleton 

 well ; and several old Roman coins are now and then found there. This might 



