Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: CHAPTER III. GLASS APPARATUS. The most important pieces of apparatus required by a student for the methods of analysis which follow, are mentioned in alphabetical order. 1. BOTTLES. 3—4 wide-mouthed bottles for corks, of 2—4 and 8 oz. capacity. 2. BLUE CLASS. A piece of glass 3 in. square, colored blue by cobalt. 3. FLASKS. Several 4 and 8 oz. Bohemian glass, flat- bottomed flasks. Beaker glasses may be used instead of flasks, but they are more expensive. 4. FUNNELS. 3—4 glass funnels from i inch to 3 inches diameter. Those with an angle of 60 should be chosen. 5. BODS. 2 glass rods 6 inches long. The glass should be cut of the proper length with a file, and the edges should be rounded by heating them with the blowpipe. 6. TEST-TUBES can be purchased of any dealer in chemical apparatus. 7 tubes 4 inches long and 6 tubes 5 inches long make a convenient set. These tubes are so thin and well annealed that a liquid may be heated in them directly over the flame of the lamp, without fear of breakage, provided the tube is moved rapidly up and down in the flame. . TEST-TUBE RACK.. A rack of any form to hold 13 test-tubes is necessary. It is advisable to provide it with wooden pins, upon which the tubes may be inverted and left to dry. APPARATUS. IQ 8. TUBES. Ib. rather thin German glass tubing, of two sizes: inch diameter and A- inch diameter. 9. WASH-BOTTXE. The wash-bottle is used to force a fine jet of water through a glass tube in order to direct it upon any object which it is desired to wash. A piece of -fV inch glass tubing is cut about 5 inches long and bent nearly in the middle at an angle of 120 (see 37); another piece, 10 inches long, is drawn off at one end to a fine point, and at about three inches from the point is bent at an angle ...