as the material used for the purpose. Most mummies have been described as wholly enveloped in linen cloth, and some persons are disposed to doubt the existence of cotton cloth in any, not excepting in the one now under consideration.
But with respect to the last point, a simple experiment has, I think, set the question at rest. If the surface of old linen, and of old cotton cloth be rubbed briskly and for some minutes with a rounded piece of glass or ivory, after being washed and freed from all extraneous matter, the former will be found to have acquired considerable lustre; while the latter will present no other difference than that of having the threads flattened by the operation. By means of this test I selected several pieces of cotton cloth from among the many bandages of our mummy, which I submitted to the inspection of an experienced manufacturer, who declared them to be of that material.
Besides the appeal to the senses of "an experienced manufacturer,"
Dr. Granville here proposes a new test, that of rubbing
in the manner described. But, although cotton cloth in
all circumstances has less lustre than linen, still this cannot be
considered a satisfactory criterion.
The ingenious John Howell of Edinburgh[1] paid some attention to this question, having a few years since obtained and opened a valuable mummy. He and the friends, whom he consulted, and who were weavers and other persons of practical experience, most of them thought that the cloth was altogether linen: some however thought that certain specimens of it were cotton.
This curious and important question was at length decisively settled by means of microscopic observations instituted by James Thomson, Esq. F. R. S. of Clitheroe, one of the most observant and experienced cotton-manufacturers in Great Britain. He obtained about 400 specimens of mummy cloth, and employed Mr. Bauer of Kew to examine them with his microscopes. By the same method the structure and appearance of the ultimate fibres of modern cotton and flax were ascertained; and were found to be so distinct that there was no difficulty in deciding upon the ancient specimens, and it was also found that they were universally linen. About twelve years after Mr. Thomson had commenced his researches he published the results of them in the Philosophical Magazine[2], and he has ac-*
