Harris, John · Montreal, Lovell Printing and Publishing Co. · leaf 92
ticles or waves overan extended area, but it emanates from a central pointand radiates from that point in all directions. Nownote the difference as it applies to Herschels examples.Instead of a ball, let A., in the figure, represent a drop ofrain descending perpendicularly towards the point Son the… … simultaneously with the arrival of the drop of rain atthe same point, the drop will have passed through thetube without coming in contact with it. But observethat the upper mouth of the tube will now be at B. Ifa shower of rain be descending, another drop may cer-tainly enter the tube at B. ; but…
Astronomy
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