OUtuary. 367 



water, and tlie solution was filtered to separate ibe insoluLIe 

 residue ; Acetic Acid in excess was added to the fihered li- 

 quor j by means of Ammonia, it proved (o have retained no 

 Silica ; the solution was freed from Carbonic Acid by su- 

 persaiuralion vvitl) Ac*Hic Acid and subsequent ebullition, 

 the excess of Acetic Acid was neutralized witfi Ammonia, 

 and the solution was treated with Muriate of Lime ; this oc- 

 casioned a white floculent precipitate, which, when heautd 

 with concentrated Sulphuric Acid, disengaged vapours, hav- 

 ing the odouj- of Fluoric Acid, and they corroded glass with 

 energy; therefore this precipitate was Fluate of l4ime. It 

 was out of my power to estinate the quantity of Fluoric 

 Acid contained in the mineral, owing to the small quantity I 

 had ai my disposal, more especially as it was intimately inter- 

 ^lixed with blue Spinell and Pargasite. From the prece- 

 ding facts 1 do not doubt, if the mineral from Finland be 

 again examined, it will prove to be a Fluo-Silicate of Mag- 

 nesia, and that the two substances In question must, as such, 

 be hejeafter ranked in our Mineralogical systems. 



I submit this letter for publication in the next number of 

 your interesting Journal. 



And am, very respectfully, 



Your obedient servant, 



H. SEYBERT. 



Art, XXI V\ — Obituary. 



PROFESSOR FISHER. 



Perhaps most o^ our readers are apprized of the fact, 

 that Professor Fisher was among the number of those, who 

 perished in the wreck of the Albion, on the morning of the 

 22d of April last. 



Soon after the news of the death of Professor Fisher was 

 confirmed, an Eulogy embracing the principal circumstan- 

 ces in his life and "character, was delivered in the College 

 Chapel, by Professor Kingsley : and the parts o^ the fol- 

 lowing account which are marked by inverted commas, are 

 taken from ihat performance. 



