Apres lecture et adoption du prooes- verbal de la 

 seance du 21 Mai dernier 



Le Sceetaiee depose sur la table differentes pu- 

 blications et brochures offertea a la Societe. 



Le De. Meldeum communique la note suivante sur 

 une perturbation magnetique qui s'est produite en 

 Mai dernier : 



" All the magnets were more or less disturbed 

 from 9 a.m. on the 11th to 6 a.m. on the 14th, and 

 from 5 p.m. on tbe 25th to 11 p.m. on the 28th. The 

 periods of greatest disturbance as shewn by the photo- 

 graphic curves laid upon the table, were from 10 p.m. 

 on the loth to 5 a.m. on the 14th, from 9 a.m. to 3 p.m. 

 on the 26th, from 7 to 9 p.m. on the 27th, and from 

 2 a.m. to 3 p.m. on the 28th. 



" It was now universally admitted that there was 

 a close connexion between the physical state of the 

 SUD, as indicated by the presence or absence of spots 

 on his disc, and terrestoral magnetism, and the mag- 

 netic disturbances which took place from the 25th to 

 the 28th of May were coincident with a large number 

 of sunspots. As would be seen from a photograph of 

 the sun taken on the 25th, there were seven groups 

 of spots on that day. 



" Magnetic storms were often accompanied by 

 auroras, and both of them often followed by rain and 

 unsettled weather. For the last six weeks the weather 

 in Mauritius had been unusually wet and boisterous 

 for the season." 



