...cavities over various regions, and distributed the quartz material through vast deposits in the earth-s structure. The same power presides alike over the...cases, therefore, we have only to measure an angle todetermine the species. Both quartz and carbonate of lime crystallize at times in similar six.sided...

...same, whatever the variations or distortions. Other minerals have a like constancy in their erystals, and each has some peculiarity, some difference of...determine the species. Both quartz and carbonate of lime erystallize at times in similar six-sided prisms with terminal pyramids ; but the likeness here ceases...

...corresponding angles of inclination are essentially the same, whatever the variations or distortions. Uther minerals have a like constancy in their crystals,...structure, which distinguishes it from every other mineral.'VJii many cases, therefore, we have only to measure an angle totletermine the species. Both...

...and distributed the quartz material through vast deposits in the earth's structure. The same powei presides alike over the solidification of liquid lavas,...in similar six-sided prisms with terminal pyramids ; bat the likeness here ceases ; for the angles of the pyramids are quite different, and also the internal...

...The sizes of the faces vary, and also the number of faces, according to certain simple laws hereaftei to be explained ; but the corresponding angles of...in similar six-sided prisms with terminal pyramids ; bat the likeness here ceases; for the angles of the pyramids are quite different, and also the internal...

...these substances has, in the crystalline forms which it adopts, to quote from Dana's " Mineralogy," " some peculiarity, some difference of angle, or some...structure, which distinguishes it from every other mineral :" also from the fact that many of these crystalline forms have highly polished faces moulded with...

...crystals obtained in any part of this country. The sides of the faces vary and also the number of the faces, according to certain simple laws hereafter...distinguishes it from every other mineral. In many eases, therefore, we have only to measure an angle to determine a species. Both quartz and carbonate...

...the faces, according to certain simple laws hereafter to be explained, but the corresponding angle* of inclination are essentially the same, whatever...therefore, we have only to measure an angle to determine a species. Both quartz and carbonate of lime crystallize at times in similar six-sided prisms, with...

...crystals obtained in any part of this country. The sides of the faces vary and also the number of the faces, according to certain simple laws hereafter...therefore, we have only to measure an angle to determine a species. Both quartz and carbonate of lime crystallize at times in similar six-sided prisms, •with...

...crystals obtained in any part of this country. The sides of the faces vary and also the number of the faces, according to certain simple laws hereafter...therefore, we have only to measure an angle to determine a species. Both quartz and carbonate of lime crystallize at times in similar six-sided prisms, with...