(5f) 
pafs, I. That the Intermediate planesjor 
the quadrilatei nal planes are made’ up 
of the i^afes of the extreme planes, and 
fp the fame intermediate planes are big¬ 
ger in fpme Chryftals, in other lelfer, in 
fpme altogether wanting. 2. That the 
intermediate planes are alnioft always 
firiate or ftreaked % but the Extreme 
planes keep the marks of the matter joy- 
uedtotherh. ' 
ni. The ChrjfialUn matter Is not fut 
to all the Extreme f lanes at one and the 
fame time-^mr in the fame quantitj . Hence 
it is, I. That the Axe ot the Pyramids 
doth not always make one and the fame 
ftreight line with the Axe of the Co- 
lumnc. 2. That the Extreme planes are 
feldom equal to one another, whence 
follows an unequality of the intermedi¬ 
ate planes. 3. f hat the Extreme planes 
are not always triangular, as neither 
all the intermediate planes are always 
quadrilateral. 4. That the Extreme fo- 
hd Angle is refolved into fcveral folid 
Angles: which alfo often befalls the In¬ 
termediate iblid Angles. 
■' IV. The whole plane is not atxvajs co- 
verd va. h a chrjTallin matter^ but there 
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