Improvements in the Victor-Meyer Two improvements in the Victor-Meyer have simplified the apparatus and greatly increased the accuracy of molecular weight determinations. As shown in the diagram, the sample liquid is contained in a small glass bulb 8-9 mm in diameter, with a 3 4 c m cq~illsrystem, blown from 4-mm of soft glass tubing. The ampoule is sealed after the weighing and filling operations and supported by s. trigger rod. The first innovation is an indentation made with a pointed carbon rod at the bottom of the softened inner tube. The falling ampoule strikes this tip. The second innovation cannot he seen. After the ampoule is prepared, the edge of a tungsten carbide glass knife is used ta sorape along its circumference. No marks arevkible, but theampoule becomesmuch morefragile. It remains strong enough, however, to withstand the normd handling of weigbing and filling. These innovations have eliminated the uncertainty of the ampoule's breaking. MOREISBADER MORAVIAN COLLEGE BETHLEHEM. PENNSTLYANIA
500
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Journal of Chemical Education
B
C-Support
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