VOL. 6. No. 3
52 1
AN ELECTRIC WATER STILL
AN ELECTRIC WATER STILL*
A very efficient and convenient form of water still is described below. This still is easy to construct. After starting it requires no attention to operate. The water from this still is very pure. By using electricity, gas flame, which is dangerous where inflammable, volatile solvents are necessary, is eliminated. The still is efficient, hot water from the top of the cool-
J A-Water level; B-Copper wire; C-Steam outlet; D-Block tin pipe; .!-Tube for drainage; F-Hot water; &To drain; I S H o t water; I-Pneumatic trough; J-Cold water inlet; K-Distilled water outlet; L-Straw ring support; M-Heating coil; N-Hot water inlet; &Glass tube.
ing tank passing t o the liter flask and siphoning into the still. A twentyliter bottle can be filled in five hours. A coil of resistance wire is placed in the bottom of a twelve-liter flask and covered with water. Six feet of wire are used for 110 volts. The flask is kept about one-half full of water. Two copper wires, each inside glass tubing, are led to the heating coil. Connection is made by use of leads,
* No originality is claimed for devising this waterstill. writer for any value it may have.
It is simply offered by the
soldered to the copper wires. A piece of block tin pipe extends from the neck of the flask to a pneumatic trough. The tin pipe enters one end of the trough near the top, is coiled around inside the trough and passes out near the bottom a t the opposite end. The places where the pipe passes through the ends of the trough should be soldered. Cold water enters one side of the trough near the bottom, and passes out near the top a t some convenient place. Short pieces of copper pipe, soldered to the trough, make convenient water outlets and inlets. From the trough, the water passes through a rubber tube to a one-liter flask. The water enters the flask by means of a side arm on the neck, fills the flask, and flows out through another side arm. From the bottom of this flask a glass tube extends to the bottom of the still, and through i t water siphons into the still. The curved ends prevent air bubbles entering the tube and breaking the siphon. A four-hole rubber stopper closes the still. If the boiling water splashes, a Gooch crucible may be wired over the end of the tin pipe. Below are listed the materials necessary to construct this water still. 1 twelve-liter flask (pyrex) (Size optional) 1 pneumatic trough 6 ft. glass tubing (pyrex) 5 ft. block tin pipe (capper pipe could he used)-inside dia. l'Ir cm. 1 one-liter flask
5 ft. rubber tubing 1 rubber stopper No. 11 1 small roll tape 1 straw ring support (or cork) 2 short pieces of copper pipe 2 ft. copper wire No. 12 6 ft. resistance wire' (for 110 volts)
I The resistance wire used is Chrome1 A. Size 24-1.53 Hoskins Mfg. Ca.,4445 Lawton Ave., Detroit, Mich.
ohms per ft. Made by
