 | Robert Galloway - 1870 - 486 pages
...advisable not to collect the film on porcelain, but upon the outside of a large test-tube (fig. 5, e) ; this method is especially used when it is needed to...the sample of substance is held on the glass tube (J) before the lamp so that it is placed at the height of the middle of the upper reducing flame, and... | |
 | William Elderhorst - 1873 - 314 pages
...advisable not to collect the film on porcelain, but upon the outside of a large test-tube (Fig. 22, D); this method is especially used when it is needed to...for the purposes of further examination. The fine asbestos thread with the sample of substance is held on the glass tube (£) before the lamp so that... | |
 | William Elderhorst - 1874 - 340 pages
...advisable not to collect the film on porcelain, but upon the outside of a large test-tube (Fig. 22, D); this method is especially used when it is needed to...for the purposes of further examination. The fine asbestos thread with the sample of substance is held on the glass tube (f) before the lamp so that... | |
 | 1866 - 608 pages
...advisable not to collect the film on porcelain, but upon the outside of a large test-tube (fig. 5, e) ; this method is especially used when it is needed to...the sample of substance is held on the glass tube (b) before the lamp so that it is placed at the height of the middle of the upper reducing flame, and... | |
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The fine asbestos-thread with the sample of substance is held on the glass tube (J) before the lamp so that it is placed at the height of the middle of the upper reducing flame, and the test-tube fixed so that the lowest point is just above the end of... 