Expeditious Mode of Manufacturing Vinegar. 273 



smaller tub of ^" or b" in depth is placed, the bottom of which is 

 perforated with small holes of ^^' wide and V in distance, but quite 

 smooth and plane. A wooden plug is put into each of those holes, 

 and in such a manner that if a liquid is contained in the tub, it will 

 only be allowed to pass dripping. This tub stands at 1" distance 

 from the wall of the concentrating tub. It is understood that all 

 these parts have to be constructed of well soaked wood, and par- 

 ticularly those where the plugs have to fit, for otherwise the holes 

 would swell on and prevent the passage. of the fluid. Right above 

 the holes c.c, a perforated sieve- like bottom is put, filled with washed 

 beech shavings, or stalks of grapes. In order to close the concen- 

 trating tub, the following manner will be best — to fix a rim of sheet 

 tin, \" broad and deep, for covering the staves, so that when nailed 

 on, the cover will exactly fit into the stave, and when the same is 

 provided with a sheet tin on its edge and wet leather, it is natural 

 that the cover will only come as far as the rim, without touching 

 the bottom of the staves. On the edge of the tub a wet strip of 

 coarse linen is laid, where the cover is to rest on ; the rim is filled 

 with water, and the air is by these means cut off. 



In order to observe the temperature in the concentrator, the bulb 

 of a thermometer may be affixed, through a hole bored in the mid- 

 dle of the tub at c?, and the scale may be fastened outside the tub. 

 In order to effect a strong draught of air through the concentrator, 

 without losing any of its vapors, another principal part, the condens- 

 ing apparatus, is put in connection with the above, and consisting 

 of three wooden tubes h, i, k, the width of which must be equal to 

 that of the holes c, c. h, I' long, reaching in the hole of the cover, 

 the joints are carefully stopped up with tow or linen, i, is rather 

 ascending, (in order that the condensed vapors from it may be able 

 to return,) through the wall of the vinegar room k, and is then con- 

 nected with the self-opening part I, that in passing through the cooler 

 m, to the small vessel n, the contents of which are to be filled back 

 from time to time into the concentrator. It is understood that all 

 the joints have to be well stopped up, and that fresh water has al- 

 ways to be kept in the cooler. 



The third principal part is the filling apparatus ; by boring at 2'' 

 distance from the edge of the cover of the concentrator a second 

 hole, which connects, by means of a leather tube, provided at both 

 ends with tin tubes, the wooden cockscrew g and the small keg p, in 

 air-tight manner. 



Vol. XXXI.--N0. 2. 35 



