Sclen tijie Intelligence. 



narked with each \^ww\i<'\ ac -retion to the valv 

 vth strongly marked. Nucleus apical. Lat^C!) 

 vidth 2"'" V . round-triangular. Lines of growth s 

 i ridge; nucleus sub-apical. 



■ it field a cope of a paper l)V him |" Descriptions of new sp< 

 Fossils from" Ohio-)- iv;»'l before the New York Aeadcm 

 ences and bearing the date of March, 1882. In this papei 

 ntitication o! tliis genu- Plmnidites is announced, in the H 

 Miesee and Portage) slialcs, and a new species PI. Xticln 

 cribed. Mr. Whitfield has, however, stated to the mthoi 

 sun for feeling some doubt as to t he ads inability of refei 

 forms to this genus as they present considerable varii 

 m the typical forms, though there can be no doubt of I 

 riped characters,. PI. Devonicm, however, so closely a$ 



SCIENTIFIC INTELLIGENCE. 

 I. Chemistry and Physics. 



]. On the Absorption- Spectrin a of Ozone.— Chapfuis has 

 ied with care the absorption-spectrum of ozone. He fin 

 exceeilinolv characteristic, so much so that it serves foi 



or chemical properties. |>y its means he has investigate* 

 decomposition of ozone by heat, the formation of ozone 

 carbon dioxide is subjected to the electric discharge, the pr 

 tion of pernitric oxide when oxygen and nitrogen are elect 

 and other similar phenomena. The spectroscope used had 

 prisms, only one of which might be employed if desired, 

 ozonized oxygen was contained in a tube 4*5 meters 

 and was prepared under atmospheric pressure and at \l 

 Eleven bands were observed in the spectrum, their wavedci 



;;'' 



ollows: (L)«S28'5, ('_')<•><'!'•-.-.-»«.».•;•.-., (3) 577-0-56< 

 5, (.V) 5:i.vO-5*27-i>, (6) 50S-5 502-O, 7) 492-5-40 



(1. (Hi^lril tUS ,. ,,-m ., , ■„„,„,, ill) H4-D 



'com 



all. It con 



app. 



mgible rays but no new bands. I!y no metho* 



