( m . 
The next Step in the Cryflallizatlon is D, in which 
thofe Bodies are lengthen’d, and have fliot out a great 
many more from their Sides, at equal Angles, but une- 
qual Lengths, as growing continually Ihorter and fhor- 
ter, till they terminate in a Point : I meafur’d fome of 
thefe, and found them to be about one quarter of an Inch 
in Breadth. I faw but very few of them in Perfedion, 
for the collateral Shoots were fo exquifitely fine, as to 
be liable to be broken in their Fall, or confounded to- 
gether by the leaf: Degree of Heat. 
Of the next kind, E, I faw a very great number, 
which being examin’d by the Microfcope, plainly ap- 
pear’d to be nothing but the former in Diforder. The 
Edges of thefe were in general very irregular, but fome 
of them happened to be fo indented, as to look like the 
jagged Leaves of Plants. 
The next Kind, F, had twelve points regularly difpo- 
fed, and probably might confifi: of two of the former 
fo join’d together, as to cut their Angles equally. 
Perhaps alfo thofe Mr. Morton defcribes, as confiding 
of Raciiii which, inftead of terminating in a Point, grow 
bigger, as they advance from the Centre, might be for- 
med from-two of the Kind, C, fo join’d at the Centre, as 
to cut each other’s Angles unequally *, for in the Pro- 
grefs of the Cryftallization, thefe Radii would quickly 
unite. 
Laftly, that Sort, which Defeartes compares to Rofes, 
and of which he has given a Figure in his Treatife of 
Meteors, may be nothing but the Kind E, when the 
Points are rounded off, by being gently thaw’d. 
I propofe thefe things only by way of Conjedure^ 
becaufe, as the final I Drops of Water may be impreg- 
nated with very different Particles in the Air, it is not 
eafy to determine, whether thefe Figures may not be the 
Refult 
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