A treatise on the diseases of the chest : in which they are described according to their anatomical characters, and their diagnosis established on a new principle by means of acoustick instruments : with plates / tr. from the French of R.T.H. Laennec, with a preface and notes by John Forbes.
- René Laennec
- Date:
- 1821
Licence: Public Domain Mark
Credit: A treatise on the diseases of the chest : in which they are described according to their anatomical characters, and their diagnosis established on a new principle by means of acoustick instruments : with plates / tr. from the French of R.T.H. Laennec, with a preface and notes by John Forbes. Source: Wellcome Collection.
Provider: This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.
469/506 page 425
![Bony Concretioris in the Lungs, Page 117. These generally consist of a large proportion of phos- phate of lime, a small proportion of carbonate, and ani- mal matter. See Thomson's Chemistry ^ 5th edit. vol. iv. page 572. See also Dr. Prout's Analysis^ Lond. Med. Repos. vol. xii. page 352. Black Pulmonary Matter, Page 130. In the Philosophical Transactions for 1813, Dr. Pearson has given an account of this matter, and a chemical analysis of it, which, as usual, are overlooked by our author. I give the result of Dr. P.'s examination in the words of Dr. Young:—> He [ Dr. Pearson] considers the bronchial bodies as true lymphatic glands, and thinks the black sub- stance which often tinges them, consists of charcoal, derived from small particles of dust, floating in the atmo- sphere, which have been taken in by the absorbents, and deposited in their glands: and he has found some of the lymphatics occasionally filled with a similar substance. He supports his opinion by chemical experiments, which show the insolubility of the black substance in nitric acid, while he has been unable to find any other animal sub- stance, the ink of the cuttle-iish not excepted, that resists the action of the acid. The glands of the mesentery, he says, are also sometimes black, but their blackness dis- appears upon immersion in the nitric or muriatic acid.* Medullary Tumour, Page 1S7« It is extremely discreditable to M. Laennec hot only to have taken no notice of the English works that mention this species of tumour, but to Iiave claimed the discovery of it to his own country. *Ie may certainly plead the custom of his country in excuse; but he might have had sufficient candour to consider this as A custom more honoured in the breach than the observance. It is scarcely necessary to * Young on Consumption, page 4C8. 3 I](https://iiif.wellcomecollection.org/image/b2106281x_0469.jp2/full/800%2C/0/default.jpg)
