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SCIENTIFIC NEWS. 
merits of particles or regular coverings which disguise, under 
such various forms, one and the same primitive form or nucleus, 
and which give rise to such an infinite variety of crystalline solids 
as are met with in nature. The laws of decrements are detailed 
in the synthetic form, and illustrated by leading examples, all of 
which are rendered legitimate by the methods of analysis, and 
synthesis by appropriate models, both solid and dissected, so as 
to interest their mind, and to leave positive and exact ideas in 
the memory. The models referring to this part of the work 
are the following : the rhomboidal dodecahedron, considered as 
a secondary form originating from a cube as the primitive solid ; 
the production of an octahedral solid considered as a secondary 
crystal, originating from a cube as a nucleus— production of the 
irregular pentagonal dodecahedron originating also from a cube 
of the bi-pyramedal dodecahedron, originating from a cube as a 
primitive solid. 
In part 4th the author has considered the difference which 
exists between structure a/id increment, as relating to the 
production of crystals, and the alterations to which the sym- 
metry of crystals is subject : and these are succeeded by the 
electricity of crystals— -their double refraction, — principles of 
nomenclature — amorphous crystallization, — table of crystalline 
forms, &c. & c. 
CAPTAIN Lisiansky, one of the celebrated Russian circum- 
navigators, who a few years ago commanded one of the 
Russian ships in company with Captain Krusenstern round the 
world, has lately published, at St. Petersburgh, his curious and 
interesting voyage, in the Russian language, which I under- 
stand the author himself intends to publish likewise in English. 
The work is already translated, and the materials ne'es>a ry 
for publication are in great forwardness. I am info* ned 
that it will be more complete in English than it i- 
original, as it will contain a greater number of drawing s. 
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