76 The Opulent Blind* — Artificial Cold, 



' I wish here to correct a mistake which I made in the ac- 

 count of the electric column printed in your Magazine for 

 March last. I there have miscalled the ends of the co- 

 lumn : that which I have named the zinc end should have 

 been named the silver end, and the contrary. So that the 

 effects on the electrometer of the coated jar were, respect- 

 ing the plus and minus states, just what might have been 

 imagined they would be. The mistake arose owing to the 

 silver and paper being connected together; for, had the 

 two metals been united, and the paper separate, the instru- 

 ment would then have re?embled more the usual construc- 

 tion of a Galvanic trough ; and I should not, I imagine, 

 have been led into any error respecting the names of the 

 ends or poles of it. I remain, &c. 



B. M. Forster. 



THE OPULENT BLIND. 



The plan to which we alluded in our last has been since 

 published in a prospectus. For the purpose of this Tiumane 

 institution a convenient house has been taken at No. 5, 

 Prospect Place, Lambeth. The prospectus states : That 

 under the patronage of his royal higness the Duke of Sus- 

 sex, a seminary is to be opened for the tuition of blind sub- 

 jects of the higher classes of society, where they may be 

 taught reading, writing, the means of corresponding with 

 distant friends, music, geography, the belles lettrcs, lan- 

 guages, the rudiments of the sciences generally, and such 

 a familiar acquaintance with prevailing accomplishments, 

 as will enable the blind of both sexes to partake of the in- 

 nocent amusements of societv, including draughts, back- 

 gammon, chess, cards, dancing^ &c. Among other addi- 

 tions to the plan of M. Haiiy, who succeeded in a similar 

 attempt at Paris before the revolution, and on whose mo- 

 del the institution professes to be formed, it adopts the idea 

 of its pupils deriving, from a constant and consoling illus- 

 tration of the Gospels, those dispositions to habitual cheer- 

 fulness and content which they are so eminently calculated 

 to excite when contemplated properly. 



ARTIFICIAL COLD. 



Professor Leslie, of Edinburgh, in following out a 

 series of experiments on the relations of air and moisture, 

 has within these few weeks been led to a very singular and 

 important discovery. Without any expenditure of male- 

 rials, he can, by means of a simple apparatus, in which the 

 action of certain chemical powers is combined, freeze a 



mass 



