February, 1942
INDUSTRIAL AND ENGINEERING CHEMISTRY
Therefore, it appears that containers of different sizes may be used on the modified Stormer viscometer although not interchangeably; furthermore, the viscosity may be calculated from the weight-time determinations,, provided K’ and A in Equation 3 have been determined with the same size containers.
Nomenclature viscosity, poises F = driving weight, grams t = time required for 100 revolutions of paddle, seconds p = density of liquid, grams/cc. V = volume of flow, cc. I = length of capillary tube q
=
167
m = end correction coefficient for capillary tube C, K , K‘, A = constants
Literature Cited (1) A. S. T . M . Group 1, Sub-committee V I I I , Committee D-1, Unpub. obaervations. (2) A. 5 . T . M. Standards, D-562-40T (Tentative) 1940. (3) Bingham, E. C., “Fluidity and Plasticity”, p. 5, New York McGraw-Hill Book Co., 1922. (4) Ibid., pp. 17-21. (5) Perry, J. H., Chemical Engineer’s Handbook, pp. 1271-7, New York, McGraw-Hill Book Co., 1934. (6) Sawyer, R. H., A . S. 2’. iM.Bull., Jan., 1940, 19. PRESENTED before t h e Division of Paint, Varnish, and Plastics Chemistry at the 102nd Meeting of t h e AMERICAN CHEMCAL SOCIETY, Atlantic City, N. J.
Front-End Volatility of Gasoline Blends J
N. B. HASKELL AND D. I
