404 KANSAS CITY REVIEW OF SCIENCE. 



Now in any case of evidence where there were so many strong facts on one 

 side and only one on the other would any jury in the land give a verdict against 

 the side of many facts in favor of the one fact no stronger than any one of the 

 facts on the other side? Would they not be apt to say, if this phenomenon is 

 produced by dust, why not gather more of it — quantites of it — right here when 

 the phenomenon occurs ? When the phenomenon continues for month after 

 month, and is so conspicuous and general would they not be apt to hold that this 

 dust ought to be so thick in the air as to cause a universal discomforture there- 

 from; would they not be apt to require a sample of dust possessing such lumin- 

 ous qualities, not a mere grain or two but a quantity ? I think they would at 

 least demand this much if not more. 



On the other hand there would be no difficulty in proving to them that this 

 phenomenon occurs, every time, under certain conditions of the atmosphere ; and 

 only at these times.- That moisture is thus suspended in the air, and that it has 

 all the qualities to produce such an eifect. 



People not familiar with the Weather-Map cannot well appreciate the full 

 force of this presence of delicate moisture. They may think it peculiar not to 

 have it regularly, at stated times, and as much or little one year as another. 

 But herein is one of the special beauties of this wonderful map. It shows us that 

 nature is never twice alike. Here in the United States the year of 1883, as a 

 whole was conspicuous for a prevailance of " High." What were the conditions 

 over the rest of the world we cannot prove, as here, by actual observation, but 

 if a certain condition is the cause of a certain natural phenomenon here it is safe 

 to say that a like effect in other countries will be produced by a like cause, and 

 more particularly so when we have all the indirect proof, sky and color, which is 

 the natural result of this condition. 



The areas of high and low-barometer travel around the wotld in belts. 

 These belts vary in line and form and are never twice alike. The peculiar juxta- 

 position and course of " Low" and "High" is what makes the variation in our 

 weather. A high " Low " giving us hot, dry weather with occasional local show- 

 ers; " High " over us giving us cool, pleasant weather that does not require much 

 moisture, for not much is used. In this case the moisture is not taken away, out 

 of the ground, etc., and transported somewhere else, as with high-" Low" and 

 southerly winds over a great extent of country. With " High " the sky is clear 

 and quite free of clouds; there not being much moisture and heat to generate 

 them, nor wind to bring them from afar. What moisture then is present is dis- 

 seminated to such a degree that the direct rays of the Sun, at right-angles to the 

 earth, does not reveal its presence ; it is only when the Sun is below the horizon 

 that its presence is realized. 



If this phenomenon is caused by dust it would seem that we ought to have 

 the supply of dust replenished quite often, but we have had no new supply and 

 yet the phenomenon continues. 



Unfortunately the Weather-Map is a new thing and the scientific world there- 

 fore knew little or nothing about it. . Hence it is not surprising that they should 



