Sentence:  Mr. Corston states that 781,605 straw hats had been imported from 1794 to 1803; and that in the last four years of that period 5281 lbs. of straw-<WSD>plat</WSD>, which was equal to 26,405 hats, had also been brought to this country. 
Meaning of the word marked with <WSD> tags:  Material produced by braiding or interweaving, especially a material of interwoven straw from which straw hats are made.