Dr. Kaemtz on Electro-magnetism. til 



rantes lineares erectas exiguae albae, quasi imbeciJles et 

 forte sine poUine. Stylus albus strictus antheras 3-4- 

 lineas superans, at corona humilior, stigmate obsolete 

 trilobo. Gcrmen triloculare embryonibus pluribus. 



Floret — Apr. medio. H. % . 

 major. D. corollas laciniis oris reflexis, filamentis plus quam 

 2. semiliberis, stylo coronam aequante. 



Narcissus albus ohlongo culice lutco serotimis major. 

 Park. Parad. 73. 3. 



Descriptio. Priore in omnibus triplo major at si- 

 milis, scapo minus striatulo laeviore. Spat/ia uniflora. 

 Corolhe laciniae speciosa incurvo-expansse, ad oras al- 

 tissime reflectentes, basi imbricantes, tubum cum ger- 

 mine aequantes, vel superantes, coronaque tertia parte 

 longiores. Corona lutea, at pallidior quam priore, ore 

 magis plicatim crenulato. Filamenta aequalia tubum 

 longe superantia, sed humiliora quam corona; tria tubo 

 interne connata, at superne plus quam semilibera ; tria 

 alia aliquantulum altius tubo connexa. Anthercc erectse, 

 externe parum curvatulae, colore subaurantiaco, polline 

 magis conspicuo quam in priore, sed non abundante. 

 Stylus prioris, at major, coronas longitudine. 

 Floret fine Aprilis. H. % . 



XCII. On the Law according to "which the Electro-Magnetic 

 Power of the Connecting Wire of the Voltaic Pile is aug- 

 mented by Schweigger' s Multiplier. By L. F. Ka£Jitz, 

 Phil. Doct., ofHcdle.* 

 1. IMMEDIATELY after Oersted's discovery had be- 

 -'- come known, the idea occurred to Professor Schweigger 

 of increasing the electro-magnetic power of the voltaic pile 

 by winding the connecting wire around the compass ; he 

 showed at the time, in his lectures, some experiments, with 

 intent to examine in what degree the electro-magnetic power 

 would be augmented by each additional convolution of the 

 wire around the compass. The experiments, however, which 

 were made here soon after the invention of the multiplier, 

 were unsuccessful as to the discovery of a determinate law 

 for this increase: (see Schrader de Electro-magnetismo, ^2. 

 Schweigger's Journal, N.R. bd. i. p. 6.) I considered, therefore, 

 that it would not be superfluous to ascertain this law by more 

 exact experiments. 



2. Before I jjroceed, however, to the description of the ex- 



* From Schweigger and Mcincckc's Nitcs Joainal, band viii. p. 100. 

 Vol, (i2. No. 308. Dec. 1823. 3 K periments 



