Chicago : Engineering and Contracting Pub. Co. · leaf 220
(1) thatany desired amount of bitumen may be pouredin without touching the sides above the leveldesired; (2) it is easily cleaned; (3) on ac-count of the 1.6-mm. bore the stopper can bemore easily inserted when the tube is filledwith a very viscous oil than if it contained acapillary opening. When… … 5=0- Fig. 4—Engler Viscosimeter. pycnometer is first weighed empty and thisweight is called a. It is then filled in theusual manner with freshly distilled water at25° C, and the weight is again taken andcalled b. A small amount of the bitumenshould be placed in the spoon and brought toa fluid…
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