58tf ^ECEMBKK. 



IbssiiF manures which may be found urrctcr them ; 

 lor this purpose the apparatus is not formidable : 

 and for a laboratory, if he has a small blacksmith's 

 sbop- and forge (which no large farm should be 

 without), it will serve the purpose very well. It is 

 only providing a cupboard, under lock and key, to 

 secure his glasses and the other articles necessary 

 Icr these experiments. One caution, however, I 

 must premise, if he has no forge, and converts 

 some other room to this purpose, if it he attached 

 to> his house or offices, and a fire (from whatever 

 cause) should- consume them, the laboratory would 

 vitiate his insurance at a fire office, unless he enters 

 it, and pays for the whole as doubly hazardous, in 

 the language of insuring. 



The apparatus necessary consists of the following 

 particulars : A deal table with a drawer, which drawer 

 should be sufficiently short of the full breadth to 

 allow a range of holes in the upper surface for glass 

 jars to stand, free from danger of falling. 



Haifa dozen glass cylindrical jars, nine or ten 

 inches long, and three or four inches diameter; 

 with a few of the same shape, but smaller. One or 

 two others, five' or six inches diameter and eighteen 

 inches long : the contents in ounce measures mark- 

 ed o them with a diamond, beginning at top 

 (when they stand inverted, or the mouths down- 

 tvards) 1, 2, 3, &c, descending. These to receive 

 and measure the air or gas expelled by heat. 



Two or three old gun -barrels (the touch-hole 

 closed), cut to the length of eighteen inches, and a 



small 



