cm] 



X^^^IV. Intelligence and Miscellaneous Articles, 



ON PROCURING AN EaUAL TEMI^ERATURE, 



To Mr. TillocL 



Sir, vJn accidentally looking over a volume of the Me- 

 dical Journal For 1801, I found a short but pleasing account 

 of the effects of the climate of Madeira in cases of pulmo- 

 nary tubercles. The communication is. dated in January in 

 the above year, and is addressed by Dr. Adams, then resi- 

 dent in that island, to a medical friend in this country. It 

 concludes wijh the following suggestions ; — *' These are, I 

 believe, the principal inquiries you wished to make ; — it is 

 true they are of little consequence compared to the in)por- 

 tant fact you have in view, ft is however satisfactory to 

 trace probable causes, and it may be luell worth your while 

 to try whether spacious buildings, regularly heated^ -Srt/e^ 

 ventilated, and large enough to admit of necessary exercise, 

 may not answer the purpo'ie Jor such ivhose want of means, 

 of courage, or of leisure, prevents their taking a voyage to a, 

 more genial climste." 



It r?; not my wish, by sending yon the above, to detract 

 from the claims of Dr. Pearson, with ^A/hom the same idea 

 seems to have originated : perhaps that truly respectable 

 practitioner is noX even aware of the existence of the passage 

 m question. It is but fair, however, that the claims of others 

 should be recognized, when the public, as in the present in- 

 stance, begin to reap the benefits of their suggestions. 



I am, &c. 



X.Y. 



MAGNETISM. 



Mr. Leopold Vacca has discovered a method of com- 

 municating magnetism to a bar of iron without a magnet. 



He takes a bar of iron of about three feet in length, 

 which gives no sign of possessing any magnetic virtue 

 as long as it lies in a horizontal position : but it possesses 

 this in a very sensible degree when placed perpendicularly. 

 These signs disappear again when it is laid down horizon- 

 tally, and appear again when it is lifted up vertically. 



A small bar of s:eel rubbed several times in the same 

 direction, against the extremity of the other bar, when 

 situated vertically, acquires magnetisan : whence the dis- 

 coverer concludes, that magnetism may be communicated 

 tV a body, without cither a natural or an artiiicial magnet. 



COBALT. 



