( 773 ) 



leaves, hut willioiil (lowers. I coiisidci' il ;i hiri»c K-aved shool ffbr 

 iuslaiiee, froiu a latent bud of llie Iniido of (^//crcns sp/ra/if >^m. yiiv. 

 gracUipcs KiN(i. 



On (lie authentic label is written: "^/?/^^/v'?/.s' .s-/V/r/cv'A/A/ Hi.., Pasang, 

 Java, in niontanis Moeriah, Herb. Wailz." 



5. Qiwrcus nltUbi Wh. I.e. 294. 



The view, already expressed in Koord, and Vai,kton I.e. G5, that 

 (his species, which so far has only been recorded with certainty 

 from Sumatra, does not yet belong to the Hora of .lava, is conlirmed 

 in my opinion, by the material in 's Rijks Herbarium at Leiden. 



Leiden, March 1908. {To he continued). 



Geophysics. — ''Tlie Startim/ Inijmlse of Maipietic DiMtirhancesy 

 By Dr. W. v.\n Bkmmk.len. 



(Communicated in the Meeting of March i28, 1908). 



Last year ^) I communicated the compilation of a statistical list of 

 the magnetic disturbances which (he magnetograph at Batavia has 

 recorded during the period 1880—1899. I drew the atteidion to the 

 phenomenon of the starting impulse i. e the suddenly appearing 

 change of the magnetic elements, which vei-y often accompanies the 

 beginning of a magnetic storm. 



This phenomenon appearing in like manner at Batavia and at 

 other places, I ventured a supposition on the manner in which we 

 can I'epresent to ourselves the aj)pearance of magnetic disturbances. 

 To obtain a closer knowledge of this in my opinion very instruc(ive 

 [jhenomenon, I requested at the end of 1906 all Magnetic Observa- 

 toi'ies to give me (heir data for a nund:)er of cases selected l)y 

 myself. 



With great readiness those data were forwarded to me from 

 several observatories and it is an agreeable duty for me to express 

 at this place my thanks for it. 



Besides this material i-eceived fj'om many sides I have worked 

 out all cases registered at Batavia and at Buitenzorg and have also 

 been able to watch the nature of the electric earth-current during 

 the phenomenon. I wish to communicate here of the results of this 

 material what is most important, commencing wnth Batavia. 



') Proceedings 29 September 1906. 



Also : Obseivations made al the R. Magn. and Met. Observatory of Batavia, Vol, 

 XXVllI, App. 111. 



