Expeditious Mode of Manufacturing Vinegar. 273 
smaller tub of 4” or 5” in depth is placed, the bottom of which is. 
perforated with small holes of $” wide and 1” 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,¢, 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, 1” 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 d, 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. A, 1’ long, reaching in the hole of the cover, 
the joints are carefully stopped up with tow or linen. 7, is rather 
ascending, (in order that the condensed vapors from it may be able 
to return,) through the wall of the vinegar room &, and is then con- 
nected with the self-opening part /, 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 3” 
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, 
Vou. XXXI.—No. 2. 35 
