96 
MIcROGRAPHIA: 
as Bi! Ifa fifth be joyn'd to themon either fide in as clofe a pofition asit 
can, whichis the propriety of the Textwre,it makes a Trapezinm, or four- 
fided Figute, two of whole angles are 120. and two 60. degrees, as C, 
Ifa fixth be added, asbefore, either it makes an equilateral triangle,as D, 
ora Rhomboeid, as E, or an 7 ed Figure, as F, which is com- 
pos'dof.two primary Khombes. If a feventh be added, it makes either 
gn equilatero-hexagonal Figure, as G, or fome kind of fix-fided Fi- 
gure, asH, or I. And though there be never {fo many placed together, 
they may be rang’dinto fome of thefe lately mentioned Figures, all the 
angles of which will be either 60. degrees, or 120. as the figure K. 
which isan equiangular hexagonal Figure is compounded of 12. Globules, 
or may be of 25, 01:27, 0r 36, or 42, ce, and by thefe kinds of texture, 
or pofition of globular bodies,may you find out allthe variety of regular 
fhapes, into which the fmooth furfaces of Alu are form’d, as upon ex- 
amination any one may eafily find ; nor does it hold only in fuperficies,but 
in {olidity alfo,for it’s obvious that a fourth Globule laid upon the third in 
this'texture, compofesa regular Tetrabedrox, ‘whichisa very ufual Figure 
ofthe ¢ of Alum. And (to haften) there is no one Figure into which 
Alum is v'd to be cryftallized, but may by this texture of Globules 
be imitated, and by no other. : : 
: Leould inftance alfo in the Figure of Sea/alt,and Sal-gem,that it iscom- 
posid of atextureof Globules, placed ina cubical form, as L, and that all — 
the Figures ofthofe Salts may be imitated by this texture of Globules,and 
_ by-nolother whatfoever. And that the forms of Vitriol and of Salt-Peter, 
asallfo of Cryftal,Hore-froit,&c. are compounded of thefe two textures, 
but modulated by certain proprieties: But I have not here time to in- 
fift upon, as I have not neither to ihew by what means Globules come to 
bethuscontext, and what thofe Globules are, and many other particulars 
requifite toa full and intelligible explication of this propriety of bodies. 
Nor have I hitherto found indeed an opportunity of profecuting the in- 
uiry fo farrasI defign'd; nor dol know when I may, it requiring abun- 
donee ace of time, and a great deal of affiftance to go through with what I 
defign’d; the model:of which was this: | 4 
_ Firft,to get. as exact and full a collection as I could, of all the differing 
toneertoneneical figur'd bodies, fome three or four feveral bodies of 
; Secondly with them to get as exact a Hift as poflibly I could Jearn 
of their places of Generation or finding, pap a Raa as many 
circumftances that tended to the Illuftrating of this Enquiry, as pollibly 
Icould obferve.. | ETE 
egy to make as many trials as upon experience I could findre- 
Gencedbill Hitigtnn sok orate, ies lizing Salts for 
_ Bourthly, to make feveral trials on. divers othe “ its, as Metals, 
Minerals, and Stones, by. diffolving them, in feveral Acenfiraums, and 
eryftalizing them, to fee what Figures would arife from ‘thofe feveral 
~ -Fifthly, - 
