Abstract
Annalen der Chemie und Pharmacie viii. Supplement band, 3 Heft. Hesse has contributed a lengthy paper on the alkaloids of opium. It is the most exhaustive essay on the rarer alkaloids that has yet been published. He has examined minutely the following:—Pseudomorphin, laudamine, codamine, narcotine, papaverine, nitropapaverine, cryptopine, nitrocryptopine, proto-pine, laudanosine, and hydrocatarine, and numerous salts of each of the above. The author groups the alkaloids into four classes, the morphine, thebaine, papaverine, and narcotine groups, and gives the distinctive characters with which the members of these groups dissolve in pure concentrated sulphuric acid. Marignac follows with a long communication “On the specific heat, density, and expansion of certain solutions.” Bousingault has made some experiments on the freezing of water. He took an exceedingly strong steel cylinder, placed in it a small steel bullet, and filled it entirely with water at 4° C, the cylinder was then closed by means of a cap, so that it was absolutely tight; the cylinder was exposed to a temperature of –24° for some time, but the water inside was not frozen, as was proved by the mobility of the bullet in the interior. Immediately on opening the cylinder and relieving the pressure, the water became a mass of ice.
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Scientific Serials . Nature 5, 415 (1872). https://doi.org/10.1038/005415a0
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DOI: https://doi.org/10.1038/005415a0