THE WINDS THAT BRING OUR RAINS. 503 



ON AN ELECTRIC SELF-REGISTER FOR THE ANEMOSCOPE AND 



ANEMOMETER.* 



BY PROF. H. E. SADLER, OF THE KANSAS STATE NORMAL SCHOOL. 



The current from a Robinson's Anemometer is carried to four springs, elec- 

 trically connected about the dial of the anemoscope, each of which presents a 

 projection at one of the cardinal points. The arrow carries a section of a cyl- 

 inder, concentric with its axis and three-eights of its circumference, which, com- 

 ing in contact with either of the projections, forces its spring against a binding 

 post. From each of these four posts an insulated wire returns to the battery 

 through an electro-magnet. 



The north and south magnets are placed on opposite sides of an armature 

 carrying a pencil. A second pencil is controlled by the east and west magnets- 

 and rests by the side of the first on a cylinder carrying a tape and revolved by 

 clock-work. 



The pencils are held in place, when the circuit is broken, by springs on op- 

 posite sides, which are attached by threads to the armature and also to winding 

 ]:)Osts at each end of either spring. In this way the spring is prevented from pull- 

 ing the armature past the center. 



The velocity and direction of each mile is thus recorded to eight points of 

 the compass. 



THE WINDS THAT BRING OUR RAINS. 



BY A. W. BROWNE, U. S. SIGNAL SERVICE OBSERVER, LEAVENWORTH, KAS. 



As that ancient and time worn theory which claims that " the amount of rain 

 that falls in Kansas is entirely dependent upon the snowfall in the mountains " is 

 again brought before the public by its few supporters, the signal service will give 

 below in the light of facts the result of ten years' systematic observations in the 

 Missouri Valley. 



The prevailing wind for each year, during the past nine years, has been south, 

 as will be shown by the following table : 



* A Paper read before the Kansas Academy of Sciences. 

 V-32 



