Per ton of copper higher under the series than it is under the multiple system; but against this, it must be remembered that the new works of the Baltimore Copper Smelting and Rolling Company, which are as large as those of the Anaconda Copper Mining Company, are using the Hayden process, which is the chief representative of the several series systems. In this system rolled copper anodes are used; these, being purer than many cast anodes, having flat surfaces, and being held in place by guides, dissolve with great regularity and require a space of only a in.
In England it was greatly stimulated by the visit of Mrs Hayden, a professional medium from Boston, in the winter of 1852-1853.
A third work, usually ascribed to Mannyng, chiefly on the ground of its existing side by side with the Handlyng Synne in the Harleian and Bodleian MSS., is the Medytacyuns of the Soper of oure lorde Jhesu, And also of hys passyun And eke of the peynes of hys swete modyr, Hayden marye, a free translation of St Bonaventura's De coena et passione Domini....
Hayden, Reports of the U.S. Geological and Geographical Survey of the Territories (12 vols., Washington, 1873I883); Clarence King, Geological Exploration of the Fortieth Parallel (~ vols.
FERDINAND VANDEVEER HAYDEN (1829-1887), American geologist, was born at Westfield, Massachusetts, on the 7th of September 1829.