Experiments and observations on the light which is spontaneously emitted, with some degree of permanency, from various bodies. / By Nathaniel Hulme, M.D. F.R.S. and A.S. From the Philosophical Transactions.

  • Hulme, Nathaniel, 1732-1807.
Date:
1800
Catalogue details

Licence: Public Domain Mark

Credit: Experiments and observations on the light which is spontaneously emitted, with some degree of permanency, from various bodies. / By Nathaniel Hulme, M.D. F.R.S. and A.S. From the Philosophical Transactions. Source: Wellcome Collection.

    29/34 (page 27)
    Milk. Exper. 12. Human milk not being easily obtained, some mackerel-light was incorporated, by agitation, with two ounces of fresh cow's milk, which was thereby rendered finely lumi¬ nous, and continued shining above 24 hours. Fresh cream also retained some light; though it was not so visible as with milk, owing probably to its thickness. But, when either milk or cream turn sour, they contract a very extinguishing property. A quart of milk was kept five days, in a moderately cool place, in the month of June; by that time, it was changed into a mixture somewhat resembling curds and whey, that is, into a soft smooth coagulated part, and a very thin one, both which were acidulous. Some fine mackerel-light was mixed with two ounces of each of them, in separate phials, and they extinguished it immediately. Printed by W. Bulmer and Co, Russel-court, Cleveland-row, Sts James’s.