SCIENTIFIC NE\yS. 75 



Discovery of a new Planet, hy Mr. Olbers. 



Mr. OLBERS has written to Mr. le Fran9ais Lalande, New planat 

 that he has recently discovered a new planet. The follow- oibers!"^^ ^ 

 int^ are such elements of its orbit, as he has been able to 

 determine. 



The 2yth of March, at 21 minutes after 8 mean time, its Elements of 

 ascension was 134° 8'; its north declination 11° 4?^ its orbit. 



On the 30th, at 12h. 33^, mean time, its ascension wiis 

 183° 52'; its north declination 1 1° 54'. 



It has been seen at Paris, and was visible to the naked Seen at Parla 

 eye. Its size appears nearly that of a star of the fifth mag- ^y t^* naked 

 nitude. Apparently it is about the same distance as the 

 three lately discovered planets, Ceres, Pallas, and Juno. 



Fluoric Acid in Teeth and Bones. 



In our Journal, VoL XIII, p. 214, is a letter with which Fluoijc acidtn 

 we were favoured by Mr. Brande, to show, that the enamel ^^®^ ^ bone«* 

 of the teeth does not contain any fluoric acid, an ItaUan 

 chemist having asserted, that they did. A letter from Mr. 

 Gehlen to the editor of the Journal de Physique, dated 

 March l6, informs us, however, that the fluoric acid exists 

 both in the enamel and bony part of teeth, and in other 

 bones. His words are : 



*' The very extensive and accurate experiments of Mr, 

 Berzelius of Stockholm have proved, that the enamel and 

 the bony part of the teeth of man and of the ox, as well as 

 their bones themselves, contain fluoric acid. The foUowino' 

 are the results of the analyses. 



" Enamel of human teeth, Enainel of the teeth of the ox. 



Phosphate of lime 85*3 81 Component - 



riuate of lime 3*2 4 P^''^^ ®f t^« 



Carbonate of lime 8*0 7'1 tee\h 



Phosphate of magnesia 1 -5 3 



iSoda, combustible animal mat- Natron 1 '34 



tcr, water 2 Animal matter 3.56 



lUU 100 



Osseous 



