and electrical disturbances, earthquakes, volcanic eruptions, 

 hurricanes, tornadoes and atmospheric disturbances of all 

 kinds. This cause he assigned to the equinoctial perturbation 

 proceeding from the various planets of the solar system. After 

 .in investigation extending through twelve years, Prof. Tice, 

 in 1875, published a treatise on Meteorology, setting forth his 

 theory and the results of his observation and research. This 

 treatise, while challenging respectful consideration, is not 

 presented iii such a logical and well-digested manner as to be 

 considered convincing testimony in support of his theory. 



Thus the investigation has drifted until the present time 

 without attaining results that are regarded ;is conclusive. 

 The cause of the eleven years sun-spot cycle remains as much 

 a mystery as ever. 



In 1890 I obtained Prof. Tice's work on Meteorology, 

 and \v;is so much impressed with the reasonableness of his 

 theory that I engaged in a serious study of the subject, whien 

 lias been prosecuted with more or less constancy during the 

 subsequent years. It seemed to me that the great desideratum 

 was to first make a demonstration of physical facts. Is there 

 an actual concurrence between Jupiter's equinoctial passage 

 and sun-spots.' It ought to be possible to demonstrate this 

 proposition so thoroughly that there would no longer be a 

 reasonable doubt on the subject. The physical facts being 

 first established. ;i theory would be forthcoming: perhaps 

 several theories. 



In this paper I attempt to show that there is a very 

 close and well-sustained approximation in dates between 

 Jupiter's major equinox and maxima of sun-spots; also, as a 

 corollary to the foregoing, that there is ;i close and well- 

 sustained approximation between .Jupiter's solstice near the 

 perihelion passage, and minima of sun-spots. This constitutes 

 a double demonstration in support of Prof. Tice's theory. 



The equinoxes of Jupiter, like those of the earth, occur 

 approximately midway between the perihelion and aphelion 

 points in his orbit. The equinox which succeeds the perihelion 

 passage is termed Jupter's major equinox. This equinox is 

 Dearly coincident with sun-spot maxima. 



The solstice which approximates Jupiter's perihelion 

 passage (corresponding to the earth's winter solstice) is taken 

 ;is the point nearly coincident with sun-spot minima. The fol- 

 lowing diagram will serve to illustrate our thesis: 



;,i 



