soldered to the copper wires. A piece of block tin pipe extends from 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 trough near the ...
5 downloads 4 Views 608KB Size
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 rnbber 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 it 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 (copper pipe could be used)-inside dia. 11/%cm. 1one-liter flask

'

5 ft. rubber tubing 1rubber stopper No. 11 1 m a l l roll tape 1straw ring support (or cork) 2 short pieces of copper pipe 2 ft. copper wire No. 12 6 ft. resistance wire' (for 110 volts)

The resistance wire used is Cbromel A. Size 24-1.53 Hoskins Mfg. Co., 4445 Lawton Ave., Detroit, Mich.

ohms per ft. Made by

Ramsay Memorial Rellowships. The Ramsay Fellowships in Chemical ScienceBritish, Dominion. and Foreign-which are tenable in the Universities and University Colleges of the United Kingdom, are a t present held by the following. In each case the University or College which has been selected by the Fellow for his research is given: British Fellowships: Dr. A. M. Taylor (University of Cambridge), Dr. R. H. Purcell (Imperial College of Science and Technology, Londan). Glergow Fellowrhipr: Dr. Peter Maitland (University of Cambridge), Miss Irene McAlpiue (Special Fellowship. University of Glasgow). American Fellmuship: Dr. R. H. Dalton (University of Oxford). Canadian Fellowship: Dr. W . H. Barnes (Royal Institution, London). Danish Fellowship: Miss A. M . Unmack (University of Oxford). Greek Fellship: Dr. D. Nider (University College, London). Japanese Fellowship: Dr. Yohei Yamaguchi (University College, London). Nelherland Fellmuship: Dr. H. Bienfait (Imperial College of Science and Technology, Londan). Swedish Fellowship: Mr. H . Liander (University College, London). Swiss Fellowship: Dr. G. Schwarzenbach (University College, London). The total value of the annual amount of the Fellowships that is awarded is approximately £4000, of which about £3000 is provided by grants from Dominion and foreign sources.-Chen. Age, 20, 75 (Jan. 26, 1929).