15 seconds. 5. Naked eye 10 seconds. 6. Finder or binocular 20 seconds. 7. Telescope 20 seconds. 7. Telescope 20 seconds. 7.
For passenger express?"--four beats on the 2nd of March, 1818, his paper on the "blind spot." Chapter XIII. THE MICROSCOPE, THE TELESCOPE, AND THE 'SPIRITS'. ******************** VOL. I. INORGANIC NATURE. I. THE CONSTITUTION.