therefore, possible to work with higher pressures than with an open soda vessel. Besides this great advantage, it is also of importance that the pressure in the steam boiler can be kept at a more uniform height. [Illustration: FIG. 3.] [Illustration: FIG. 4.] TABLE.--100_kilogs. Soda Lye containing 20 parts Water with a corresponding boiling point of 220 deg. Cent. absorb Steam as follows_: +----------------------------------+--------------+---------------+ |Final pressure in condenser. | | | +----------------------------------+Pressure in |Corresponding | | 0 | ½ atm. | 1 atm. | 1½ atm.|steam boiler. | temperature. | +----------------------------------+--------------+---------------+ |80 kil.|125 kil.|200 kil.|350 kil.| 2 atm. | 136.0 deg. C. | |65 " | 88 " |130 " |190 " | 3 " | 143.0 " | |51 " | 70 " | 98 " |125 " | 4 " | 153.3 " | |41 " | 58 " | 80 " |100 " | 5 " | 160.0 " | |34 " | 48 " | 66 " | 80 " | 6 " | 166.5 " | |27 " | 40 " | 55 " | 70 " | 7 " | 172.1 " | |22½ " | 33 " | 47 " | 60 " | 8 " | 177.4 " | |19 " | 28 " | 41 " | 52 " | 9 " | 182.0 " | |16 " | 24 " | 35 " | 46 " | 10 " | 186.0 " | |12 " | 18 " | 28 " | 35 " | 12 " | 193.7 " | | 9 " | 14 " | 22 " | 33 " | 15 " | 200.0 " | | 2 " | 8 " | 12 " | 21 " | 20 " | 215.0 " | +-------+--------+--------+--------+--------------+---------------+