An important property of calcite is the great ease with which it may be cleaved in three directions; the three perfect cleavages are parallel to the faces of the primitive rhombohedron, and the angle between them was determined by W.
As in the other rhombohedral carbonates, the crystals possess perfect cleavages parallel to the faces of the rhombohedron.
Common or potash feldspar crystallizing in the monoclinic system and having two cleavages at right angles to each other.
These cleavage planes help considerably in the bringing of the stone to shape, for in a broad sense, a finished cut stone may be said to be in the form in which its cleavages bring it.
So it certainly is not necessary for all the cleavages to occur just in their normal order.
Furthermore, pepsin is limited in its action to the production of proteoses and peptones, while trypsin gives rise to a series of hydrolytic cleavages which result in the ultimate formation of comparatively simple bodies.
The lecture was variously rewritten, monks and myths chasing one another through his brain, instead of the crystal-cleavages and rock-forms he had set out to study.
Even here, however, the social cleavages were deep, while in Valencia things were nearly as bad as in Castile.
On the best developed of the three cleavages the lustre is pearly, on other surfaces it is of the ordinary vitreous type.
Abbott has explained the artificial cleavages of stone in the American Antiquarian (viii.
For historic boundary lines, physical demarcations, and social cleavagesonly incidental allowance was made.
But if the vertical cleavages by which the country was divided were deepened, those of a horizontal character, arising from social and economic privilege, were in this period largely done away.
The mineralogical name of the species is micro-cline, meaning small inclination, and refers to the fact that the angle between the two cleavages of the mineral is not quite a right angle.
Says Mr. Webb: "One suggestion that these fragments of indigenous Indian Local Government seem to afford is that we sometimes tend to exaggerate the extent to which the cleavages of caste have prevailed over the community of neighbourhood.
Burma had almost no illiteracy when the British took possession of it; its population was absolutely homogeneous and the solidarity of the nation ran no risk from "cleavages of religion, race and caste.
Isometric crystals, nearly always in cubes with three good cleavages at right angles, and parallel to the faces of the cube.
Three excellent cleavages at right angles and parallel to the crystal faces of the cube.
Three good cleavages making angles of nearly 90 degrees with each other.
They are triclinic, with cleavages meeting at approximately 86 degrees.
Remarkable because of its four good cleavages meeting at such angles as to permit good cleavage octahedrons to be broken out of crystals.
The two potash feldspars are orthoclase and microcline, the former being monoclinic, with cleavages at exactly 90 degrees, and the latter triclinic, with cleavages a little less than 90 degrees.
Most common by far are those which crystallize in the monoclinic system with prismatic faces and two good prismatic cleavages meeting at about 24 degrees.
Defn: Common or potash feldspar crystallizing in the monoclinic system and having twocleavages at right angles to each other.
Footnote 1: There are at least four definite cleavages at Coniston, besides joints.
It has rather imperfect cleavages in two rectangular directions, and is usually translucent, with a vitreous luster and a color which is olive-green when not stained brown by oxide of iron.
Two rather imperfect cleavages are directed parallel to the longer axis of the crystal and nearly at right angles to each other.
It is especially important to note whether, in the case of several cleavages possessed by a crystal, all have the same degree of perfection, or whether they exhibit differences.
Chalybite crystallizes in the rhombohedral system and is isomorphous with calcite; like this it possesses perfect cleavages parallel to the faces of the primitive rhombohedron, the angles between which are 73 deg.
I am well aware how insufficient, and, in some measure, how disputable, the account given in the preceding chapters of the cleavages of the slaty crystallines must appear to geologists.
The cleavages and lines of force are the following.
Lastly, at page 186 of this volume, I have alluded to the various cleavages of the aiguilles, out of which one only has been explained and illustrated.
For the rest, no words are of any use to explain the subtle fidelity with which the minor roundings and cleavages have been expressed by him.
The cleavages which govern the whole are precisely the same as those of the Aiguille Bouchard, only wrought into grander combinations.
We have first, observe, a rounded bank, broken, at its edges, into cleavages by inclined beds.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "cleavages" in a variety of sentences. We hope that you will now be able to make sentences using this word.
