 | William Milburn - 1825 - 646 หน้า
...OPAL. — This gem is commonly found in detached pieces, in an envelope of a different kind of stone, from the size of a pin's head to that of a walnut. Beautiful opals of this last size are extremely rare, so that it is difficult to find an opal sufficiently... | |
 | Thomas Curtis - 1829 - 824 หน้า
...Hungary. Opals are generally discovered in detached pieces, in an envelop of a different kind of stone, from the size of a pin's head to that of a walnut. Beautiful opals of this last size are extremely rare : so that it is difficult to find an opal sufficiently... | |
 | 1841 - 272 หน้า
...state. Opals are generally discovered in detached pieces, in an envelope of different kinds of stone, from the size of a pin's head to that of a walnut. An immense number of small grains of opal are sometimes found dispersed through the substance of porphyry;... | |
 | John Livingston Ludlow - 1846 - 708 หน้า
...characters? — A. It comes in tears and masses; the tears which are the purest are in spherical pieces, from the size of a pin's head to that of a walnut ; they have a yetlow exterior, and interiorly they are white and shming ; they are very brittle ; the... | |
 | James Copland - 1852 - 446 หน้า
...irregular nodulated aspect. A fresh section presents a surface with numerous loculi or cysts, which vary from the size of a pin's head to that of a walnut, filled with a clear glistening gelatinous matter, surrounded by fibrous substances or meshwork." Cancer-cells... | |
 | Daniel Kimball Whitaker, Milton Clapp, William Gilmore Simms, James Henley Thornwell - 1854 - 588 หน้า
...found on every portion of the oak, — roots, stems, leaves, and buds, — and, varying in dimensions from the size of a pin's head to that of a walnut, consist of one or many chambers, according to the number of eggs which they contain. The ova of other... | |
 | Sir William James Moore - 1861 - 246 หน้า
...becomes thickened, tuberculated, and darker, and may be mistaken for syphilis. The prominences vary from the size of a pin's head to that of a walnut, and the face or part affected presents a curious tuberculated appearance. Sometimes the fingers are... | |
 | William Frazer - 1864 - 492 หน้า
...dry it is collected, and exported to India. The finest pieces or tears are roundish masses, varying from the size of a pin's head to that of a walnut, externally yellow or brownish, and when freshly broken smooth, shining, and opaline white. Lump ammoniac... | |
 | Amos Russell Thomas - 1873 - 348 หน้า
...melanotic matter occurs in small masses, of a rounded, ovoidal, or irregular shape, with or without a cyst, from the size of a pin's head to that of a walnut; of a dull, sooty, brownish, or black color. They are generally invested by a distinct capsule, formed... | |
 | Amos Russell Thomas - 1873 - 366 หน้า
...melanotic matter occurs in small masses, of a rounded, ovoidal, or irregular shape, with or without a cyst, from the size of a pin's head to that of a walnut ; of a dull, sooty, brownish, or black color. They are generally invested by a distinct capsule, formed... | |
| |
This is particularly well shown by the nickel silicate itself, which consists of rounded concretions varying from the size of a pin's head to that of a walnut. When broken open, these are usually found to consist of homogeneous, apple-green, amorphous-looking... 
