 ... by Sir John Herschel, and "punctulations" by his father. Some of these were almost black, and looked like excessively small spots just breaking out. But none of them were seen to enlarge or materially alter their form, though at times so sharply defined...  Journal of the Franklin Institute - Page 268by Franklin Institute (Philadelphia, Pa.) - 1869Full view - About this book
 | 1862 - 874 pages
...be pretty thickly covered with dark dots, like stippling with a soft lead-pencil; and these are what have been called "pores" by Sir John Herschel, and "punctulations" by his father. Some of these were almost black, and looked like excessively small spots just breaking out. But none... | |
 | 1864 - 968 pages
...be pretty thickly covered with dark dots, like stippling with a soft lead-pencil; and these are what have been called "pores" by Sir John Herschel, and "punctulations" by his father. Some of these were almost black, and looked like excessively small spots just breaking out. But none... | |
 | 1864 - 260 pages
...be pretty thickly covered with dark dots, like stippling with a soft lead-pencil; and these are what have been called "pores" by Sir John Herschel, and "punctulations" by his father. Some of these were almost black, and looked like excessively small spots just breaking out. But none... | |
 | Amédée Guillemin - 1867 - 588 pages
...often pretty thickly covered with dark dots, like stippling with a soft lead-pencil ; these are what have been called "pores" by Sir John Herschel, and "punctulations" by his father. Some of these are almost black, and are like excessively small eruptive spots.] Ill, Theories of the... | |
 | Amédée Guillemin - 1871 - 464 pages
...often pretty thickly covered with dark dots, like stippling with a soft lead-pencil; these are what have been called ' pores ' by Sir John Herschel, and ' punctulations' by his father. Some of these are almost black, and are like excessively small eruptive spots.] III. Theories of the... | |
 | Amédée Guillemin - 1872 - 460 pages
...often pretty thickly covered with dark dots, like' stippling with a soft lead-pencil : these are what have been called ' pores' by Sir John Herschel, and ' punctulations ' by his father. Some of these are almost black, and are like excessively small eruptive spots.] III. Theories of the... | |
 | Sir Norman Lockyer - 1874 - 332 pages
...often pretty thickly covered with dark dots, like stippling with a soft lead-pencil ; these are what have been called pores by Sir John Herschel, and punctulations by his father. Some of these are almost black, and are like excessively small eruptive spots. 123. When the Sun is... | |
 | 1869 - 474 pages
...points like stiplings with a soft lead pencil. These have been called 1; pores," by Sir John Ilerschel, and "punctulations" by his father. They are too minute...a minimum to a new maximum, in a period of eleven 3'ears, coinciding with a like period in the occurrence of auroras and magnetic disturbances experienced... | |
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