TEE FLUIDITY OF SOLUTIONS

179

Apparently all of those aqueous solutions which exhibit negative
curvature fall into the class of mixtures showing inflection curves.

TABLE XLVL—SUBSTANCES WHICH APPEAR TO EXHIBIT THE SO-CALLED
"NEGATIVE VISCOSITY" IN AQUEOUS SOLUTION"

Substance

Observer

Bromic acid..............

Hydroforornic acid.........

Hydrocyanic acid.........

Hydriodie acid............

Hydrosulfuric acid.........

Nitric acid...............

Ammonium acetate........

Ammonium bromide.......

Ammonium. cMoride.......

Ammonium ehromate......

Ammonium iodide.........

Ammonium nitrate........

Ammonium thiocyanate....

Caesimm chloride..........

Caesium nitrate...........

Perrouis iodide............

Mercuric chloride.........

Mercu.ric cyanide..........

Potassium bromide........

Potassium chlorate........

Potassium chloride........

Potassium cyanide.........

Potassium ferricyanide.....

Potassium iodide—......

Potassium nitrate.........

Potassium thiocyanate.....

Rubidium bromide........

Rubidium chloride.........

Silver nitrate.............

Sodiu.m iodide............

Tetramethylammonium iodide

Thallium nitrate..........

Urea.....................

Poiseuille (1847)

Poiseuille (1847)

Poiseuille (1847)

Poiseuille (1847

Poiseuille (1847

Poiseuille 1847)

Poiseuille (1847)

Sprung (1876)

Poiseuille (1847)

Schlie (1869)

Hubeaer 1873), Wagner (1890)

Sprung (1876), Gorke (1905), Walden (1906)

Sprung (1876)

Schottner (1878)

Bruckner (1891)

Poiseuille (1847)

Poiseuille (1847)

Slotte (1883), Ranken and Taylor (1906)

Poiseuille (1847)

Poiseuille (1847)

Poiseuille (1847)

Poiseuille (1S47)

Hubener (1873), Kanitz 1897)

Poiseuille (1847)

Poiseuille (1847)

Sprung (1876), Gorke (1905)

Davis, Hughes and Jones (1913)

Wagaer (1890)

Poiseuille (1847)

Poiseuille (1847)

Schlie (1869)

Sehottner (1878)

Miitzel (1891)

Most workers have con.fi.ned their attention to dilute solutions
and they have studied viscosity relations almost exclusively,
so that the positive curvature in concentrated solutions has