... et al.; 32 *, Tillman et al.; 33 dot in a box, Shafrin et al.; 34 ⊙, Wibaut et al ... al.; 48 *, Hennaut-Roland et al.; 49 ▴, Sugden; 50 ·, Kremann et al.; 51 ▾, Jaeger; 52 filled triangle ... measurements were performed with a drop developed in a closed measuring cell with a volume of about ...