74 -D?-y Rot. — Hydroplu'l'ia. 



the number of revolutions really performed by the body, accord- 

 ing as ike body revolves in the orbit reversely to the direction of 

 the circum-polar motion, or makes both rkvolutions to the 

 SAME HAND. Tile above is abstract from any motion of the ob- 

 server. " 



DRY UOT, 



This destructive enemyof buildings, which generally commences 

 its ravages in the cellars, may be prevented, or its progress check- 

 ed, by white-washing them yearly, mixing with the wash as much 

 copperas as will give it a clear yellow hue. 



HYDROPHOBIA. 



Sig. A. M. Salvatori of Petersburgh, in a letter to Professor 

 Marrichini of Rome, gives the following remedy for this dreadful 

 malady : 



" The inhabitants of Gadici, but when or how I know not, 

 have made the important discovery, that near the ligament of the 

 tongue of the man or animal bitten by a rabid animal, and be- 

 coming rabid, pustules of a whitish hue make their appearance, 

 which open spontaneously about the 13th day after the bite; and 

 at this time, they say, the first symptoms of true hydrophobia 

 make their appearance. Their method of cure consists in open- 

 ing these pustules with a suitable instrument, and makiiig the 

 patient spit out the ichor and fluid which run from them, often 

 washing the mouth with salt water. This operation should be 

 performed the ninth day after the bite. The remedy is so effec- 

 tual, that with these people this hitherto incurable disease has 

 lost its terrors." Bibl. Ital. xiv. 428. 



EXPI>OSION OF A STEAM-BOILER. 



. On the 15th of December a dreadful accident occurred at Lit- 

 tle Harwood, near Blackburn, by which two men were killed on 

 the spot, two others were so shockingly bruised that they have 

 since died of their Vv'ounds, and a fifth lies in a most deplorable 

 state with little chance of recovery; and another man and a boy 

 are also much bruised. The accident was occasioned by the ex- 

 plosion of a steam-boiler at the mouth of a pit which Colonel 

 Hargreaves and two other gentlemen are now sinking for coals. 

 The boiler weighs about four tons, and was carried, it is sup- 

 posed, about fifty yards high, and fell sixty-five yards fronj the 

 place where it was working. It was seen in its transit by many 

 persons at a considerable distance. One piece of iron of a ton 

 weight was thrown fifty yards, and several stones rmd slates were 

 found at a hundred yards from the place they had occupied. The 

 building which contained the engine was left with scarcely one 

 stone upon another. One of the unfortunate sufferers was carried 

 by the violence of the explosion to a distance of eighty yards, 

 and lived several hours after he was taken up. 



