OfOXFO ^D^SHIXEi 141 



they lye fcatter'd here and there of divers bignefles, fo artifi- 

 cially by Nature shaped round in manner of a Globe, that one 

 would take them to be great bullets, call fox fiot, to be dis- 

 charged out of great Ordnance. Such as thefe are alfo mention'd 

 by J oh. Kentmannws, found inter lapides ^rarios^ which if broken 

 (fays he) are like the filver or cinereous Martha ftte, out of which 

 fomtimes brafi or filver are fmelted p , than which ours are fom- 

 what of a better colour, but whether poffeft with thofe or a 

 better metal, I muft confefs I have not tryed, and therefore can- 

 not inform the Reader. 



180. Hither alfo muft be referred a round flone before men- 

 tioned, chap. 3 feci. 30. containing within it a white fort of 

 earth, and therefore called Geodes, or the pregnant flone ; differ- 

 ing from the JEtites in this, that whereas that has within it a 

 movable flone, by the Naturalifls called Callimws ; this contains 

 only earth or fand, that moves not at all : The outward cruft of 

 thefe is fomtimes only an indurated chalk., under which are fome 

 other folds like the coats of an Onyon ; and when found thus, by 

 the Inhabitants of the Chiltern (where they are moft plentiful) 

 they are called chalky Eggs. Others there are of them , whofe 

 outermoft coats are hard black Flints, fome very thin, and others 

 thicker, according I fuppofe to the feniority of their generation : 

 For 1 have fome of them by me whofe coats are not much thicker 

 than the shell of a Wall-nut, others ftone half way, and others 

 fo almoft to the very center; and thefe Flint coats black without 

 fide, and gradually whiter and whiter, as they approach nearer 

 to the whitifh earth contained within : whence I am almoft per- 

 fwaded, that however it may be in irregular Flints, that in thefe 

 the chalky matter does turn into flone, and is the chief principle 

 of their generation. 



181. Upon the Chil tern-hills, near to Sherbourn and Lewkjier, 

 I found many of the Flints inclining to a Conical Figure. And 

 in the gravel about Oxford, I have feen fafciated Pebbles, having 

 as it were Zones ox girdles round them, of different colours from 

 thofe of the jlones. About Fawler and Stunsfield, the Pebbles 

 before mentioned, cap. \.fecl. 18. are moft of them ftreaked with 

 iron-colour' 'd lines, fomtimes inclining towards one another like 

 the ramifications of a Dendrites ; which though not fo curious as 



* Catalog. Vi)jJt!um:,Tit id- deLapid.arariif a naturae ffigiatu. 



the 



