850 NEW YOEK STATE IHISEUM 



The present paper is, with the exception of a few facts which 

 I have obtained from other sonrces, based entirely on the mem- 

 oranda submitted by Messrs Sanderson and Diiryee. Part of 

 this material, as has been explained above, was published by them 

 in Engineering news. 



Quotation marks and separate credits have been generally 

 omitted because, at least so far as the history of the Montezuma 

 plant and the early Portland cement plants in the lower Hudson 

 valley is concerned, the matter here submitted is merely one long 

 set of quotations from the letters or papers of the gentlemen 

 mentioned. 



National Portland cement co., Kingston 



The earliest experiments in the manufacture of Portland 

 cement in this state, appear to have been those carried on in the 

 Rosendale region about 1876-76. ' They were made by a Mr 

 Dunderdale at East Kingston, Ulster co., Messrs Cornell and 

 Coykendall furnishing the capital. The materials used were marl, 

 brou-ght by way of the Erie canal from the Montezuma marshes, 

 and a clay obtained near the plant. Cement of a very high grade 

 was manufactured, but the materials and processes used were of 

 too expensive a character to permit the experiment to become a 

 financial success. The details of the experiments are not at pres- 

 ent obtainable, but some idea of the methods followed and of the 

 general high quality of the product may be gained from the fol- 

 lowing, extracted from the published report, by Gen. Q. A. Gill- 

 more, on the cements exhibited at the Philadelphia exposition 

 of 1876. 



It is deemed proper as a subject of general interest to refer 

 briefly to some cements not represented in the exhibition. 



The ISTational Portland cement co., of Kingston, Ulster co. 

 (INT. Y.) has recently been organized for making Portland cement 

 by the fourth method above described.-^ The materials employed 



1 This " fourth method " here noted was, as described on a preceding page 

 ot the report, the double-kilning process, in which the calcareous material was 

 burned and slaked before being mixed with the clay. 



