573 



. Mini in this way we fill our little flask to about fnr- 

 iif ths of its volume. This description . 1; we may 



thus till a thousand flasks \ ,<>u>;iml infu- 



1 now ask my friend to notice a trough made of sheet 

 r, with two rows of liaiuiy litll 

 :ieaih it. This trough, or ;rly fillfi 



oil; a thin pL Mutes a kind of lid for the 



oil-hath. The Wood is perforated with circular apertures 



to allow oar small fla*k to pan tiinu-n and 



plunge itself in the oil, which has been heated, say, 

 degrees Fahr. Clasped all round by the hot liquid, the 

 "ii in the flask rises to its boiling point, which is not 

 v over rees Fahr. S -lies from the 



v of the flask, and the boiling is continued for 

 i mutes. With a pair of small bra>-s ton^s, an a- 

 now seizes the neck near its junction with the flask, and 

 partially lifts the hitter out of the oil. The it 

 not cease to issue, but its violence is abated. With a 

 second pair of tongs held in one hand, the neck of the 

 flask is seized close to its open end, while with the other 

 hand a It. i .meoi an ordinary spirit flame is br 



the middle of the neck. The glass reddens, whitens, 

 I it is gently drawn out the neck diminishes 

 in diameter, until the canal is completely blocked up. The 

 tongs with th- :it of sev. 



. with its contents diminished by evaporation, is 

 a the oil-bath perfectly sealed m- . m- -:ieally. 

 v such flasks tilled, boiled, and sealed in the manner 

 described, and containing strong infusions of beef, m 

 turnip, ami cm-umber, are carefully packed in sawdu-t. 

 and ! cd to the Alps. Thither, to an elevation of 



about 7,0(K) feet above the sea, 1 HIM < MI. oo-inqu 



i :lie month of .luiy. an I 1 

 iie to putrefaction. Wt? open our h.i\ at ti 

 Alp, and count out fifty-four flasks, with their IKJH 



drinking water. In six fla^k-. however, 

 the infiiM - ind muddy. We closely these, 



and discover that every one of them has had its fragile end 

 broken oil in the transit from London. Air has CM 



-erved muddinoHs id the result. My 

 .'!! know* as well uat this 



witii a pocket-lens, or even with a mierosoo|H> of insutl 



