6. A boiling heat does not make it turbid, as in the case of the dry papaw juice, but a considerable quantity of froth is formed by it. 7. Solutions of silver, lead, and mercury, form yellowish precipitates with the above solution.. 8. The same solution when left to itself is soon covered with mould, but never becomes as fetid as that of the unprepared juice under the same circumstances. 9. The soft extract of papaw submitted to distillation in close vessels at first gave water, afterwards a reddish liquor, crystallized carbonate of ammoniac, a red, thick, and fetid oil, oily carbonated hydrogen gas, and, lastly, a light carbon, not easily burned, and which yielded by incineration very pure phosphate of lime. In comparing the effects of these two samples of papaw juice, it appears that although they possess some properties in common, they have others which differ essentially: the soft extract has the taste of boiled meat, the other only a somewhat saccharine flavour; the latter is coagulated by heat, and the former is not. The soft extract undergoes scarcely any alteration with acids, the unprepared juice is congealed like the albumen of blood by the same re-agents. It would therefore appear, that the sample kept in rum, and afterwards evaporated, had passed into the state of animal gelatine or glue; this alteration in my opinion is not surprising, for the albumen of blood experiences something similar if boiled in a great quantity of water, and this water be evaporated, It will doubtless create a certain degree of interest to see a substance, produced by a vegetable, exhibit all the properties of animal substances, for I presume that this identity will not be called in question; we thence learn that nature has given to certain kinds of plants the faculty of forming similar compositions to those produced by by the animal organization, which should in future render us cautious in pronouncing whether any matter belonged to the vegetable or animal system. It will be remembered, that a long time since M. Fourcroy found traces of albumen in the juice of certam plants; that Scheele somewhere says that a substance of the nature of cheese exists in the leaves of vegetables; and that Proust has lately discovered the milk of almonds. to be a combination of oil and cheese. But I know not that any one has yet had occasion to examine a vegetable entirely of an animal nature, and which wanted only the colouring principle to resemble blood; since it is found to contain, as has been explained above, a great quantity of albumen, a small portion of fibre, or at least some substance which has all the appearance of it, and, lastly, phosphate of lime in considerable quantity. It were to be wished that chemists, who have occasion to visit countries where the papaw grows, would submit. its milky juice, at the moment of its discharge, to chemical examination, and would likewise make some experiments on the tree itself, which must be of a particular nature. I am persuaded that they would obtain very interesting results. Intelligence relating to Arts, Manufactures, &c. AT the last meeting of this Society, M. Cossigny,.and the senators Abrial and Aboville made a report on a preparation employed by the Indians to render the members of dead bodies flexible. The reading of M. Winckler's extract relative to the Galvanic apparatus employed by Professor Schaub for deafness, was continued. The The President, M. Nauche, made some observations on the utility of employing epispastic remedies as well as Galvanism for that disorder; the latter then acts as a -direct stimulant upon the organ of hearing, and produces a powerful effect. Professor Aldini presented an account of his experiments in England on the bodies of criminals put to death by hanging, and of an experiment on a large scale, which he made on the sea-coast, by which he has proved that water, as in electricity, acts as a conductor of the Galvanic fluid to very great distances. He likewise repeated some experiments on the decomposition of water, according to the process of Wollaston. Iron Manufactures. The Iron-Office of Stockholm has offered, till the end of the present year, a gold medal, value 50 ducats, for the best answer to the following question: By what chemical or mechanical process, hitherto unknown in Sweden, can the manufacture of cast and wrought iron be improved in that kingdom, and by what means can the workmen be accustomed to it? These methods must be suited to the existing establishments for the manufacture of iron in Sweden. Vaccine Inoculation. Dr.. Buttaz, known for his treatise on phosphorus, has been commissioned by the Emperor of Russia to travel through that empire for the purpose of extending the vaccine inoculation. He has presented him with a gratuity of 1,200 rubles, and a considerable sum for travelling expenses. After staying several weeks at Moscow, he proceeded to visit the principal towns in the south of Russia, with the intention of afterwards visiting the other governments of the empire. BARKER List of Patents for Inventions, &c. (Continued from Page 400.) ARKER CHIFNEY, of London, Gentleman; for improvements in the manufacturing and preparing roofing slates, and in laying the same. Dated March 8, 1803. JAMES BENNET, of Oldham Street, Manchester, Lancashire, Manufacturer; for a method of felting woollencloth, and also of felting cloth manufactured of sheep's wool, and other combined materials. Dated March 10, 1803. SAMUEL MILLER, of the parish of St. Pancras, Middlesex, Engineer; for his improved method of applying the repelling or repulsive force of nature, in order to give a stronger impulse to any substance or body in motion, as well as to destroy the bad effects of its baneful activity. Dated March 16, 1803. EDWARD SHORTER, of New Crane, Wapping, Middlesex, Mechanic'; for an apparatus for working of pumps. Dated March 21, 1803. ROBERT CLARK, of Fitzroy Place, Middlesex, Instrument Maker; for improvements in the construction of a truss, to be worn in the case of rupture. Dated March 23, 1803. DEERS EGG, of the parish of St. Martin's in the Fields, Middlesex, Gun-maker; for improvements upon fire-arms. Dated March 23, 1803. END OF THE SECOND VOLUME, SECOND SERIES. TO VOL. II. SECOND SERIES. A AIR, experiments and observations on the heat and cold pro Page duced by its mechanical condensation and rarefaction, 118 Alkali, patent for improved processes for preparing it, 161 Allen, Mr. Report on the advantages of Mr. Chapman's preparation for preserving cordage, 98 Arts, Manufactures, &c. intelligence relating to, 158. 238. 318. 396. 471. Austin, Rev. G. Description of an apparatus for impreg nating water with carbonic acid gas, B Barreto, Mr. Patent for a method of curing ruptures, 110 256 454 siates in acid solutions of it, 382 Beams, method of securing them when decayed by time, or injured by dry-rot, 346 Beatson, Mr. Patent for a method of applying the power of wind and water to horizontal mills, and the same principle to other purposes, 13 Bertrand, M. On the extraction of spirit from potatoes, 229 for steam-engines, 321 --- Observations on, ditto 324 81 Boswell, Mr. Patent for a method of building ships, Bramah, Mr. Patent for machinery for producing straight, |