660 PHILOSOPHICAL TRANSACTIONS. [aNNO 1723. 



On the Magnitude of the Blood- globules, &c. By M. Leuwenhoeck, F. R. S. 

 N° 377, p. 341. Abstracted from the Latin. 



Dr. Jurin having explained a method of determining with certainty the dia- 

 meters of minute objects ; and particularly that the diameter of a blood globule 

 was equal to the 1 940th part of an inch ; M. Leuwenhoeck reasoned in this 

 manner: if the diameters of 1940 blood globules be equal to 1 inch; and 

 spheres being in proportbn as the cubes of their diameters, it follows that the 

 cube of 1940, or 7,301,384,000 globules, are only equal in bulk, to a globe of 

 1 inch in diameter. 



Some Amendments and Additions to the Account of Things found under Ground 

 in Lincolnshire. By Mr. Ralph Thoresby, F. R. S. N° 377, p. 344. 



As in N° 279 there is some difference between the accounts of the depth 

 of the things found; the one accounting it to be about 8 or 10 feet deep, 

 and the other 12 or 14 ; it is to be observed that the depth was not measured, 

 but only estimated according to the relator's best remembrance. But the differ- 

 ence may easily be accounted for by supposing, which will not be far from 

 truth, that when the labourers first discovered the jetties and other things there, 

 it might be about the depth of 8 or 10 feet ; but the bottom of them, when 

 they came to be all taken up, might be at the depth of about 12 or 14 feet, as 

 in the other account. 



It is also to be noted, that some judicious persons affirm, that the stones 

 which the spectators saw at the bottom of Haiiimon Beck, were such as the 

 dikers had first thrown out, on taking up the old goat, and were fallen in again. 

 But that it was a hard and firm soil is certain ; and probably that on which the 

 famous steeple of Boston stands. See the record of the foundation of the said 

 steeple in N° 223 of the Transactions. 



The form of the shoe soles found at Spalding, was as represented fig. 14, 

 pi. 16; each foot had its proper shoe, this being for the right foot. By some 

 passages in history, it may probably be conjectured when those shoe soles were 

 left there, and how long since that atterration began in that part of Lincoln- 

 shire. 



In Stovv's Chronicle, An. 1465, we read of a proclan)ation against the beaks 

 or pikes of shoone, or boots, that they should not exceed 2 inches, on penalties 

 there mentioned. And by other passages in history it appears, that those pikes 

 of shoes were before that tin)e exceedingly long, and held up by chains, that they 

 might not hinder the wearer's walking; which chains were sometimes of silver, 

 if not of gold, that they might be rich, as well as ornamental. 



