New Volcano.— Lectures. 32/ 



cattle, corn, and wine, is nearly ruined ; and a scene of 

 greater desolation and distress has seldom been witnessed in 



any country. 



A fish called by the Spaniards the curHnata, the largest 

 of which does not weigh more than two pounds, abounds 

 in the river Oronoko, in South America. It is of an excel- 

 lent flavour, but it is less appreciated for its nutritive quality 

 than for two stones lodged in the head, in the place which 

 the brain ought to occupy. They have each the shape of 

 an almond without the shell, and the brilliant colour of mo- 

 ther of pearl. These stones are bought for their weight in 

 gold, on account oF their specific virtue against a retention 

 of urine. It is sufficient to (ake three grams finelv powdered 

 in a spoonful of wine or water, to cause an instant dis- 

 charge ; but too large a dose relaxes the muscles, and occa- 

 sions an inability of retention. 



LECTURES. 



Mr. George Singer will commence his Lectures, at the 

 Scientific Institution, early in November, with an extensive 

 Course, on the Nature, Use, and Properties of the Atmo- 

 sphere ; a Historical Sketch of the Progress of Atmosphe- 

 rical Discovery, and an Experimental Elucidation of every 

 Interesting Phaenomenon dependent on the Agency of Air. 

 Including the Subjects of Pneumatics, Hydrostatics, Natu- 

 ral Chemistry and Meteorology, illustrated by an extensive 

 and appropriate Apparatus. 



Particulars may be had at the Institution^ 3, Prince's 

 Street, Cavendish Square. 



Mr. Accum's Lectures on Experimental Chemistry and 

 Analytical Mineralogy commence at the Chemical Labora- 

 tory, Comptou Stjeet, Soho, October the ISth. The Lec- 

 tures on Experimental Chemistry comprise the Practical 

 Operations of the Scientific Laboratory ; general Rules to be 

 obseived in the Performance of Experiments, and Summary 

 Experimental Elucidations of the Science of Chemical Phi- 

 losophy, The Lectures on Analytical Mincraloory devolve 

 to the Art of distinguishing Minerals, the Modes oti^xamm- 

 ing them by Chemical Agencies j and General Process of 



Analysis, 



