Meteorology, i^^ 



tinftlon between what is douhtful and what has been fully 

 proved. By thcfc means this part of the queflion can be 

 anfvvercd in a fatisfa^tory manner, though the branch of 

 natural hillory to which it belongs may not be enriched 

 with new difcoveries. 



The candidates are requefted to turn their attentiom to the- 

 lateft writers on this fubje^:, in which many hints will be 

 found to direct them in their refearches, fuch as F. A. Voii 

 Humboldt's Aphorifms, in regard to the Chemical Phyfiology 

 of Plants, Lelpfic 1794, 8vo. ; and C. G. Rafn's Sketch of a 

 Phyfiology of Plants, Leipfic 1798, 8vo. 



The anfwers to all tl|pfe quellions muft be written in 

 Dutch, French, Englifh, or German, but not in German 

 charadlers, and tranfmittcd, in the ufual manner, with a 

 fealed note containing the author's name, to Teyler's lufti- 

 tutc at Haarlem, before the id of April 1802, that the prizes 

 may be adjudged on the id of November the fame year. 



XXXV. Mifcellaneous Artichs, 



METEOROLOGY, 



X H E following curious notice has lately been publiflied in 

 one of the foreign journals by Schweighaufcr : — '^ A prelate 

 in the neighbourhood of Bale, having extended in his garden 

 an iron wire of confidcrable length for the purpofe of fuf- 

 pending from it a moveable mark to fire at, obfervcd that, 

 during variations of the atmofphere, which modified a change 

 of weather, the wire emitted a fironger or weaker found, ac- 

 cording to the nature of thefe changes. He communicated' 

 this obfcrvation to Mr. Haas, who had come to fee him, and 

 who, on his return to Bale, having caufed a fimilar wire t© 

 be extended in his garden, obferved the fame phrenomenon* 

 Some time after, the celebrated Volta, when on a vifit to 

 Haas, faw this new kind of barometer, and, in order to af- 

 c/2rtain the nature of the meteoric humming it emitted, ex- 

 tended wires of dificrent metals in dificrcnt dire6lions; but 

 found that no vibration took place, except in regard to. thofc 



wires 



