442 F. H. Bigelow — Inversion of Temperatures, etc. 



In each diagram the first curve is the solar magnetic inten- 

 sity, the second the direct temperatures minus the inverse tem- 

 peratures, the third the direct and the fourth minus the inverse 

 temperatures by themselves. The inverse residuals have all the 

 signs changed so as to bring out the conformity to the eye. 

 The factors used for the successive curves to reduce to the 

 magnetic amplitude is 1, 1, £, -^, -|, ^ respectively. 



Temperature . /ar/bfibns /h ff/eZ6 68 day Per/bc/.jforv/htf ffte D/Vecftf/nv'erje types. 



Years /878-I893. 5 A/orffy lYest Stations. 



Majntfic 

 fnhnsi-N. 



direct 

 " inverse/. 



Virecf. 



'-/ri/erse 



A few words only, on these remarkable curves are needed. 

 There can be no collusion between the magnetic and the tem- 

 perature variations, because the magnetic curve depends exclu- 

 sively upon European observations, there being none available 

 in America ; the magnetic curve was published before work on 

 the temperatures was commenced ; the argument is estopped 

 that the change of temperature as a meteorological phenome- 

 non is what affected and was observed in the magnetic field. 

 On plotting all the curves from year to year it is easy to match 

 the magnetic curve yearly and the result shows that the solar 

 rotation period is very exact, since there is no tendency to 

 sidle, in about 220 revolutions of the sun. This result carries 

 with it the conclusions, that the sun has a nucleus in which the 

 permanent magnetism resides ; that the period of rotation cor- 

 responds to the solar equatorial belt and not to the sun spot 

 belts in latitudes ±12° ; that the corona is at least in part a 

 magnetic phenomenon, since from it was first deduced the fact 



