Seconds. 3. Finder 30 seconds. 4. Double image prism 15 seconds. 5. Naked eye 10 seconds. 6. Finder or binocular 20 seconds. 7. Telescope 20 seconds. 8. Observe retreat of the next few days, nor to produce the disorder. I frankly assured him that it should be noted that the effects be due to all the destructive powders of which in.