Elements of Crystallography: After the Method of Haüy; With, Or Without Series of Geometrical Models, Both Solid and Dissected; Exhibiting the Forms of Crystals, Their Geometrical Structure, Dissections, and General Laws ...Longman, Hurst, Rees, Orme, and Brown, 1813 - 396 σελίδες |
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Elements of Crystallography: After the Method of Hauy; With, Or Without ... Friedrich Christian Accum Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2015 |
Elements of Crystallography, After the Method of Hauy: With, Or Without ... Fredrick Accum Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2017 |
Συχνά εμφανιζόμενοι όροι και φράσεις
90 degrees acute affinity antimony arrangement attraction barytes breadth calcareous calcareous spar called carbonat carbonate of lime centre chemical chemical affinity circle composed considered copper crys crystalline forms crystalline power crystallisable bodies crystallisation Crystallography cube diagonal direction Dissected dissolved dodecahedron edges effect equal equilateral evaporation faces facets Feldspar figure fluate of lime fluid forms of crystals geometrical solids goniometer Haüy hence integrant molecules integrant particles iron irregular laminæ law of decrement lead liquid lisation manner measure mechanical ment mineral kingdom Model muriate namely Native nature nucleus oblique obtained obtuse octahedron parallel parallelogram parallelopiped particles of bodies pentagonal potash primitive form produced pyramids quantity rectilineal regular octahedron regular solid rhomboid rhomboidal dodecahedron right angle saline solution secondary form sections solid angles soluble species stances staurolite structure substances Sulphuret summits surface takes place tallisation Tetrahedral Tetrahedral Prism tetrahedron tion topaz tourmalin triangle triangular prism vessel
Δημοφιλή αποσπάσματα
Σελίδα 36 - ... till it crystallizes on cooling. Alter the position of every crystal, once at least every day, with a glass rod, that all the faces may be alternately exposed to the action of the liquid ; for the face on which the crystal rests never receives any increase.
Σελίδα 36 - The salt to be crystallized is to be dissolved in water, and evaporated to such a consistency that it shall crystallize on cooling. Set it by, and when quite cold pour the liquid part off the mass of crystals at the bottom, and put it into a flat-bottomed vessel.
Σελίδα 37 - ... in solution becomes so much diminished, that the liquid begins to act upon the crystal and redissolve it. This action is first perceptible on the angles and edges of the crystal. They become blunted, and gradually lose their shape altogether. Whenever this begins to be perceived, the liquid must be poured off, and a portion of new liquid put in its place; otherwise the crystal is infallibly destroyed. Mr. Leblanc has observed, that this singular change...
Σελίδα 100 - ... attract the third particle more strongly than the tetrahedron ; that is, it will have a greater affinity for it than the tetrahedron. But if the particles of bodies differ from each other in figure, they may differ also in density and in size : and this must also alter the absolute force of affinity, even when the distances and the figure of the attracting particles are the same. The first of these two circumstances, indeed, may be considered as a difference in th...
Σελίδα 53 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds.
Σελίδα 69 - A rhomboid is that which has its opposite sides equal to one another, but all its sides are not equal, nor its angles right angles.
Σελίδα 321 - If the percolation of water containing calcareous particles is too rapid to allow time for the formation of a stalactite, the earthy matter is deposited from it after it has fallen from the roof upon the floor of the cavern; and in this case the deposition is called STALAGMITE : the substance deposited is the same as in the case of stalactite.
Σελίδα 222 - ... nucleus, undergoing decrements subjected to certain laws, upon which the forms of these crystals depend. But this is only a conception adopted in order to make us more easily perceive the mutual relations of the form in question. Properly speaking, a crystal is only a regular group of similar molecules. It does not commence by a nucleus of a size proportioned to the volume which it ought to acquire, or, what comes to the same thing, by a nucleus equal to that which we extract by the aid of mechanical...
Σελίδα 256 - ... a ray of light passes obliquely from one medium into another of a different density, it is refracted, or turned out of its former course.
Σελίδα 58 - ... angles is called a right angle; and the straight line which stands on the other is called a perpendicular to it. XL An obtuse angle is that which is greater than a right angle. XII. An acute angle is that which is less than a right angle. XIII. " A term or boundary is the extremity of any thing.