1854 T. Graham in Philos. Trans. (Royal Soc.) 144 178 The volume of liquid in this osmometer soon begins to increase and is observed to rise in the tube, while the simultaneous appearance of salt in the water of the jar may easily be verified.

1885 G. L. Goodale in A. Gray & G. L. Goodale Bot. Text-bk. (ed. 6) II. ii. vii. 224 An osmometer..consists of a small reservoir furnished with a membrane bottom, and a graduated tube at its upper part.

1903 M. H. Fischer tr. E. J. Cohen Physical Chem. ix. 139 Pfeffer measured the osmotic pressure of sugar solutions of various concentrations with a mercury manometer, and obtained with such an osmometer the following results.

1952 Q. Rev. Biol. 27 297/2 The authors consider the egg of Gryphaea virginica as an almost ideal osmometer, since swelling and shrinking are completed within 5 minutes and are moreover..completely reversible.

1991 J. M. G. Cowie Polymers (BNC) (ed. 2) 193 The osmometer is assembled, under a layer of solvent, by clamping two membranes (kept continually moist with solvent) on either side of the glass cell.

1890 Cent. Dict. 4167/1 Osmometer, an instrument for measuring the acuteness of the sense of smell.