The three circuits: a study of the primary forces . es, be-cause of the vortical manner in which the bodiesin them move. Comets approach and leave the sunas if they were following the periphery of a funnel,that is to say at a spiral angle to the suns axis; fromwhich it arises, that they offer to the sun attractivepresentation at their aphelion, repellant presentationat their perihelion, and equilibrial presentation attheir equinoxes. Therefore, their tails should beextended toward the sun in the first case, awayfrom it in the second, and there should be no tailin the third case, and probably w
The three circuits: a study of the primary forces . es, be-cause of the vortical manner in which the bodiesin them move. Comets approach and leave the sunas if they were following the periphery of a funnel,that is to say at a spiral angle to the suns axis; fromwhich it arises, that they offer to the sun attractivepresentation at their aphelion, repellant presentationat their perihelion, and equilibrial presentation attheir equinoxes. Therefore, their tails should beextended toward the sun in the first case, awayfrom it in the second, and there should be no tailin the third case, and probably would not be wereit not for the matching and mismatching of mag-netic points of intensity heretofore mentioned anddescribed. , If comets could get to their perihelion passageswith their unlike poles presented to the sun, theywould immediately coalesce with that body. Butthat is impossible, since the power that is propellingthem in their orbits, is the same power that maintainsthe stability of their axial direction. NIGHT-SIDE PHENOMENA. 129 Fig Arctic and Antarctic Comets. A thing much more likely to occur is the meet-ing of an arctic and anantarctic comet nearthe plane of the sunsequator (Fig. 13). Insuch case the vorticalcharacter of the move-ment would be neu-tral i zed. What woul dbe the result can onlybe conjectured. It isnot unreasonable tosuppose that such collisions have taken place and havebeen the cause of many meteoric showers. Assuming as we do that the orbits of comets arespiral, we notice first that a small segment of suchan orbit seen at a distance would represent the hy-perbolic form; then reflecting on the fact that thebodies moving in these orbits are repelled at theirnearest approach and attracted at their farthest de-parture, and duly considering the nature of vorticalmotion, we arrive at the conclusion that a cometleaving the sun in hyperbola may, nevertheless,return. There is another feature of the cometic phenomenonwhich Herschel describes as follows
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