 Its length and fineness also increase with the rapidity of motion of the hands. If it is desirable that the finer tube should have thicker walls in proportion to its bore than the original tube, it is only necessary to keep the heated portion soft for...  A Compendious Manual of Qualitative Chemical Analysis - Pàgina 174per Charles William Eliot, Frank Humphreys Storer - 1869 - 203 pàginesVisualització completa - Sobre aquest llibre
 | 1828 - 888 pàgines
...already often referred to. This operation is most readily performed with a piece of straight tube, open at both ends, and long enough to make two closed tubes. Let it be therefore' supposed that a piece of tube, such as that before mentioned (21.) is now to be... | |
 | Michael Faraday - 1831 - 712 pàgines
...already often referred to. This operation is most readily performed with a piece of straight tube, open at both ends, and long enough to make two closed tubes. Let it be therefore supposed that a piece of tube, such as that before men524 TUBE* CLOSED. tioned... | |
 | Charles William Eliot, Frank Humphreys Storer - 1868 - 688 pàgines
...minutes before drawins out the tube, pressing the parts slightly together the while. Bv tinprocess the glass will be thickened at the hot ring. To obtain...open at both ends, and long enough to make two closed tub. ?, In the middle of the tube a ring of glass, as narrow as possible, must be made thoroughly soft.... | |
 | Charles William Eliot - 1869 - 702 pàgines
...tube, it is only necessary to keep tho heated portion soft for two or three minutes before druwing out the tube, pressing the parts slightly together...open at both ends, and long enough to make two closed tubi s. In the middle of the tube a ring of glass, as narrow as possible, must be made .thoroughly... | |
 | Charles William Eliot, Frank Humphreys Storer - 1869 - 706 pàgines
...drawing out the tube, pressing the parts slightly together the while. By this process the glass will bo thickened at the hot ring. To obtain a tube closed...open at both ends, and long enough to make two closed tubre. In the middle of the tube a ring of glass, as narrow as possible, must be made thoroughly soft.... | |
 | Charles William Eliot, Frank Humphreys Storer - 1871 - 702 pàgines
...minutes before drawing out the tube, pressing the parts slightly together the while. By this process tho glass will be thickened at the hot ring. To obtain...open at both ends, and long enough to make two closed tub<?. In the middle of the tube a ring of glass, as narrow as possible, must be made thoroughly soft... | |
 | Charles William Eliot, Frank Humphreys Storer - 1872 - 708 pàgines
...or three minutes before drawing out the tube, pressing the parts slightly together the while. By thk process the glass will be thickened at the hot ring....tubes. In the middle of the tube a ring of glass, as narrow as possible, must be made thoroughly soft. The hands are then separated a little, to cause... | |
 | Charles William Eliot, Frank Humphreys Storer - 1876 - 692 pàgines
...the tube, and bending continuously from one end of the heated portion to the other (Fig. III., 6). Small and thick tube may be bent more sharply than...tubes. In the middle of the tube a ring of glass, as narrow as possible, must be made thoroughly soft. The hands are then separated a little, to cause... | |
 | William Ripley Nichols - 1877 - 388 pàgines
...one or two centimetres, APPENDIX. v length of the tube, and then, taking the glass from the flame, to pull the parts asunder by a cautious movement of the...tubes. In the middle of the tube a ring of glass, as narrow as possible, must be made thoroughly soft. The hands are then separated a little, to cause... | |
 | William Ripley Nichols - 1880 - 388 pàgines
...centimetres' length of the tube, and then, taking the glass from the flame, to pull the parts asimder by a cautious movement of the hands. The larger the...tubes. In the middle of the tube a ring of glass, as narrow as possible, must be made thoroughly soft. The hands are then separated a little, to cause... | |
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