The treatment of aneurism by electrolysis / by John Duncan, M.A. ; with an account of an investigation into the action of galvanism on blood and on albuminous fluids, by Thomas R. Fraser, M.D.
- Duncan, John, M.A.
- Date:
- 1867
Licence: Public Domain Mark
Credit: The treatment of aneurism by electrolysis / by John Duncan, M.A. ; with an account of an investigation into the action of galvanism on blood and on albuminous fluids, by Thomas R. Fraser, M.D. Source: Wellcome Collection.
Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.
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![commenced to decompose, and another portion was found to be ; soluble in heated caustic potash, and formed a deep brown solution. Exp. II.—A trough was made with gutta-percha, across the middle of which a piece of De la Rue's parchment was stretched so as to divide it into two cells, each of which had a diameter of 1 inch. All the other conditions t)eing the same as in the first experiment, an • electrode was placed in each cell. On closing the galvanic circuit, the same phenomena also occurred. In eight minutes, the coagula had become irregular by their lateral and anterior extension being greater than the posterior; and in the positive cell, lines of opacity were seen extending towards the parchment partition, and adhering to it. In thirty minutes, there was almost no unchanged albumen in either cell. The positive contained an irregular opaque coagulum, with a number of partially detached threads and patches. A somewhat dense sheet enclosed this coagulum, and adhered slightly to the surface of the partition, while all its contents were strongly acid. ■ In the negative cell a quantity of consistent froth, about 0*25 inch ; in diameter, surrounded the electrode, beyond which there was a I clear area limited by a thin opaque membrane, which adhered slightly where it was in contact with the partition. At first sight, this clear area appeared to consist of unchanged albumen; but, on removing the contents of the cell, it was found to be in reality a very firm and clear jelly, of a conical form, and with the diameter ! of 1 inch at the surface and 0*25 inch at its lowest point or apex. There was a very small quantity of liquid albumen in this cell, and ! it, as well as the frothy substance and the jelly, gave a powerfully 1 alkaline reaction to test paper. The other characters of these results 1 agreed with those of the first experiment. J Exp. III.—Serum obtained from the blood of a sheep was treated ) in the same way, with exactly the same results. 1 Exp. IV.—The fluid removed from a hydrocele was also acted on 1 by galvanism, and yielded the same forms of modified albumen at f each electrode. t : Exp. V.—No special results were obtained when defibrinated [ i blood was similarly treated, except a slight modification of the clots, i , which was due to the presence of colouring matters. This was prin- ] cipally a blackening of the coagulum at the positive electrode, by the ^ action on blood pigment of the acid radicles which are there set free. • I Exp. VI.—To obtain pure albumen, white of egg was dialyzed J 1 according to the process of Graham. The result was evaporated, at I a very low temperature, to the sp. gr. of 1056, and treated with ; j galvanism in the same way as in the preceding experiments. V^e I j found that changes were produced at both electrodes, which only J differed from those in white of egg by the smaller quantity of the r I results. This was very unexpected, as the absence of inorganic I i matters in solutions of pure albumen should have modified the . i effects of galvanism to an important extent. A portion of the solu- I tion was therefore dried, and, on incineration, a small quantity of j inorganic matter was obtained, proving that we had not succeeded](https://iiif.wellcomecollection.org/image/b21481714_0017.jp2/full/800%2C/0/default.jpg)
