( 85 ) 



systematic fraiii of woi-kiiiu' as is adopled :i( To,«;(d scoiiis ahovo all 

 things to 1)0 coiidiicive to thai |)iir|>ose, ('S|KM'ialIy if llic e\ai»i|»lo 

 given there he t()ih)\ve(l in a siifiicient iiuiiihei- of slalioiis elsewhere. 



In the Tegel obserxatoiy Berson as "stiindiger Mitai-beiter" is stea- 

 dily cooperating with its director. 



One of the more reccnl results, arrived at in the Tegel observ- 

 atory, may still be mentioned here. In the spi-ing of 1902 registerino- 

 balloons recorded between 12 and 1(^ kilometers an inversion 

 of temperature to an amount of 9^ This seems to i)oint to an 

 equatorial current in those })arts of the almosphere which, even 

 higher Ihan the region of the cirrus-clouds, could not but escape 

 H iLDEBR andsson' s bser \ati ons. 



Almost simultaneously an inversion was observed al)Ove P^rauce 

 by Teisserenc de Bort" at a height of more thau 10 kilometer. 



The above will certainly be sufticient to give an idea of the nature 

 and the importance of the new field and the new methods of invest- 

 igalion and to comince you that the deAeloj)ment of these methods 

 owes Aery much i]ideod to the two investigators, to Avhom we last 

 drew attention. 



Concluding the Committee beg to report thai in their unanimous 

 oi»inion the Buys-Ballot Medal should be awarded lo Richard Assmann, 

 Director of the x\eronautic Observatory at Tegel, and Arthur Berson, 

 permanent collaborator to the same institution, as a homage lo 

 the great services they have rendered to the developmeni of Meteo- 

 rology, not only in their just mcnlioned qualities, but also and 

 especially as editors of the work entitled: "Die Wissenschaftlichen 

 Luftfahrten des deutschen Yereins zur Föi'derung der Luflschiffahi-t", 

 and as those who have had the greatest shai-e in the invesligalions 

 described in this principal work. 



Botany. — "-On a Sclerotbwi hitherto unknoHm and Injurious to 

 t!i(' Cultivation of ToJ>acco" (Sclerotinia Nicolianae Oud. ct 

 Konlng). (Postscript). By Prof. C. A. J. A. Oudemans an<l 



C. J. K0NIN(i. 



With regard to the small dimensions of the cu|)s (apothecia) of 

 Sclerotinia Nicotianae, as sketched \\\ oui- essay (breadth 0,8, depth 

 0,2 millimetres) we thiidv it worth while to j)oiiit out that much 

 stoutei- cups were obtained IVom sclerotia which on the 9''' of 

 March ult. were sown out afresh in the known manner in dilFerent 



