. Bacteria in relation to plant diseases. Bacteriology; Plant diseases. 126 BACTERIA IN RELATION TO PLANT DISEASES. is good, but when it is feeble or wben the steam pressure is high the water becomes too hot and steam sometimes escapes into the reservoir. The water therefore must be hurried through the tank b)' the use of a steam pump, or else less steam must be allowed to enter the copper pipe. If the writer were to build another similar apparatus he would make the condensing tank 2 feet higher and add 10 feet to the length of the coil of tin pipe. The condensing tank is provided at the botto
. Bacteria in relation to plant diseases. Bacteriology; Plant diseases. 126 BACTERIA IN RELATION TO PLANT DISEASES. is good, but when it is feeble or wben the steam pressure is high the water becomes too hot and steam sometimes escapes into the reservoir. The water therefore must be hurried through the tank b)' the use of a steam pump, or else less steam must be allowed to enter the copper pipe. If the writer were to build another similar apparatus he would make the condensing tank 2 feet higher and add 10 feet to the length of the coil of tin pipe. The condensing tank is provided at the bottom with a i-inch inflow pipe for the cold water (it should be i}^-inch), and at the top with a iJ-<-inch outflow pipe (it should be 2-inch), for the exit of the warmed water. There is also a i-inch flush pipe at the bottom for the occasional removal of sediment. The size of the outflow pipe, which must be somewhat larger than the in- flow pipe, prevents any possibility of clogging and overflow. All the metal parts which come into contact with the distilled water are tinned or nickel- plated. Connected with the lower end of the block-tin coil (by tin solder, which must not contain lead or zinc) is a smaller (i-^-inch) block-tin pipe (11), which leads the distilled water into (15) the storage tank (3_^'-inch pi|)e would be better, and without any joint). The reservoir in this case is a white- enameled bath-tub, on the top of which is clamped down a cover of thin sheet copper (,;'„-inch), the inner face of which has been carefully tinned. Plate glass ground to fit would be better, and the tub itself is likely to be discarded in the near future, /. ^., when some more satisfactoiy storage tank can be found. The problem of the proper storage of distilled water in quantity is the hardest one, the solvent power of the water is so great. From the bottom of this bath-tub several hundred feet of 'i-inch block-tin piping lead to various rooms in the building. In addition to the termina
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