Parker's cementn.

1799 Ann. Agric. 33 106 (heading) Directions for using Parker and Co.'s aquatic cement.]

1811 Monthly Mag. July 534/2 These stones, when burnt, form a cement, well known by the name of Parker's cement.

1814 Trans. Geol. Soc. 2 193 This place is particularly known on account of its furnishing abundance of the septaria, from which that excellent material for building under water and for stucco is made, known by the name of Parker's cement.

1839 Penny Cycl. XV. 420/1 The mortars made with them are called hydraulic mortars. Of these, Parker's cement is a well known kind.

1889 W. A. Tilden Watts' Man. Chem. (ed. 2) I. 337 Parker's or Roman cement is made in this manner from the nodular masses of calcareo-argillaceous ironstone found in the London clay.

1917 E. A. Dancaster in G. Martin Industr. & Manuf. Chem.: Inorg. II. 85 The first of the natural cements was prepared by James Parker towards the end of the eighteenth century. It was known at first as Parker's cement, but was afterwards called Roman cement, by which name it is still known.

1998 I need Concrete Proof! in soc.culture.asian.american (Usenet newsgroup) 27 Aug. James Parker from England patented a natural hydraulic cement by calcining nodules of impure limestone containing clay, called Parker's Cement or Roman Cement.