French National InJI'tlutc. 93 



under the name of //"« ore. He has difcovered that this ore 

 is compofed of 43 parts of the oside of manganofe, 27 phof- 

 phoric acid, and 51 oxide of iron. He is of opinion that 

 tliefe three fnhtiances are intimately united, and form a 

 kind of triple fait with a double hafe. This combination is 

 abfolutely new to naturalifts. No one had fpokcn of it 

 before C. V^auquelin. It niufl hold a particular place, in tlie 

 IVftems of mineralogy, either in the genus of iron or the genua 

 of copper. 



C. Gillet-Lanmont read to the clafs an account of a mi- 

 neral already known to naturalills, though they were too 

 little acquainted with its fituation in the earth. This fub- 

 ftance,w^hich contains a metal lately difcovered by Vauquelin, 

 is chromated iron. It had been fcen in an infulatcd mafs by 

 C- Pontier, near Goflin, in the department of the Var. But 

 this mineralogift hasfince found it, in very great abundance, 

 in the middle of a quarry of ferpentine near the borders of 

 the fea, at a fuiall diftance from the harbour of Cavalaire ; 

 and this difcovery is valuable to the arts not only on account 

 of the nature of the mineral, but alfo on account of the eafe 

 with which it can be procured in confequence of the fituation 

 of the quarry. 



C. Juflieu read a notice of feveral kinds of Indian plants dc- 

 fcribed by various authors, and which, in his opinion, ought, 

 all to be referred to the genus known under the name of 

 litfee, the native country of which is China. 



C. Delillc, member of the Inftitute of Cairo, tranfmittcd 

 to the clafs a memoir in which he gave an exact dcfcription 

 of the doum or palm of the Thebaid, which was before but 

 imperfectly known. 



The dclert plains by which Egvpt is furrounded have not 

 at all times been deftilule of vegetable produftions. At 

 very remote pcriculs they have bten covered with trees, and 

 particularly paluis ; and this may ferve to account for the 

 petrified trunk of a palm-tree found in the defert near the 

 ifthmu.^ of Suez, and tranfuiitled to the clafs by general 

 Kcgnier, member uf the Inltilute of Egypt. 



C Hegnier, his i)i<)iher, added to this fpecimeu a manu- 

 fcript, written l)y himfelf, containing general connderation.« 

 <^n the agriculture of Egypt, as well as the ameliorations ot 

 %viiieh it is fuieeptible. 



C VVutcnat prefented the 5th and 6th numbers of bis 

 dcferi|)li(jn of thr new or little known plants cuhivalcd in 

 the gardiMi of C. CcLs. 



C LaiiJ:»rk prcleuled his Annualrc ?Ai'tt'(jroIogJf^iie pour 

 Van ic. 



C \'jn Mon-, alloeiatc, tranfmittcd to the chdt. the firrt: 



volume 



