The heatimg source is a soldering imn tip which is regulated by a rheostat. An aluminum cylinder, approximately 7/8 by 31/2 in., is drilled to fit over the soldering ...
of the liquid being boiled is slight or of negligible effect. Using two apparatus and simultaneously boiling pure solvent in one and the mixture of solvent and ...
THE melting-point apparatus described in this paper is distinguished by extreme simplicity of construction and negligible cost. It has been tested by the writer.
ably with more elaborate and expensive apparatus. A 25 X 150-mm. Pyrex test tube and a 15 X 85-mm. soft-glass test tube are needed to construct the appara-.
EMANUEL B. HERSHBERG, Converse Memorial Laboratory, Harvard University, Cambridge, Mass. THE determination of the melting point of organic com-.
external electric heater, it is difficult to attain a desirably slow and constant rise in bath temperature when approaching the melting point. The factors influencing ...
substance with this apparatus is zero. (1). It is very easy and entirely feasible to use this type of (2) boiling point apparatus to calibrate thermocouples or ther- (3).
column of the liquid colder than the inner hulk. Fur- ther on, when the liquid column makes a turn down to- ward the thermometer bulb, the liquid cooled by the.
rates prescribed by the United States Pharmacopoeia (1) is described. Therelative simplicity and ease of operation make the apparatus very satisfactoryfor ...
and its funnelahaped top placed inside the large test tube upside down, i. e., so that the month of the funnel rests on the bottom of the large test tube and the tip.
