loO • REPOKT — 1894. 



E.W., show not the least sign of any disturbance. 'The movement,' 

 M. Renou remarks, ' is therefore magnetic and not mechanical.' 



Fig. 2.— Potsdam : Horizontal Intensity, April 27, 1894. 



Utrecht (M. M. Snellen), 52° 5' 9" N., 5° 7' 55" E. April 27, the 

 nmgnetic diagrams show unmistakable traces. For copies of them I am 



Fig. 3.— Utrecht : DecUnation, April 27, 1894. 



indebted to M. Snellen. That of the flecliiiation is reproduced in fig. 3. 

 The following are the times of the beginning of the oscillations :— 



