Specification of Auguste Edouard Loradoux Bellford : apparatus for inhaling iodine.

  • Bellford, Auguste Edouard Loradoux.
Date:
1854
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Auguste Edouard Loradoux Bellford : apparatus for inhaling iodine. Source: Wellcome Collection.

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    Bedford's Improvements in Apparatus for Inhaling Iodme. At the upper part of the rod is a slender disc h, sustained by a spiral spring fixed to the stopper d. This disc may pass successively through the divisions of a scale traced on the tube, so that each degree shall represent a certain quantity of iodine deposited in the basket. This disc also serves to arrest the vapours which, instead of following the 5 inhaling tube, may have entered the body of the measure and not have been absorbed by the tube i, which is made particularly sus¬ ceptible to the action of the iodine, in order to absorb the fleeting vapours. The openings in the basket should be small enough to retain common iodine, and numerous enough to allow free passage 10 to the air. In this apparatus the draught is made from below, and the section of the inhaling tube smaller than the total of space allowed by the holes in the basket, for the double purpose of prevent¬ ing the obstructions of the holes and the rising even of the basket itself in case of a too strong inhalation being made. 15 If when breathing the vapours of iodine it be found inconvenient to work the measurer, the contrivance as in Fig. 4, may be used. A, represents the space in which is placed the basket, after having charged it with a certain quantity of iodine. When the iodine has been inhaled a certain time, to ascertain the quantity absorbed place 20 the different parts of the iodinometer on the support P ; the stopper K, is taken out, and the basket drawn from the tube A7, to hang it on the hook B7. By subtracting this new weight from the first weight, the difference indicates the quantity of iodine absorb’d. This is effected instantly, and with the greatest ease, by means of the 25 small hooked spoon, represented in Fig. 6. To cause iodine to penetrate into the system, it is sometimes necessary or more convenient to have it injected or insufflated instead of inhaled. For this the same means are employed, and the same apparatus; only care must be taken to construct the branches 30 of the apparatus serving for the emission and admission of the air in such manner that, if necessary, an adjusting vapour conducting pipe may be added on one of the sides, and on the other a reservoir of air or other gas (an india-rubber bottle, for instance). In such case, instead of warming the iodinometer by the hand, it is better 35 .