Professor Hering on the Circulation of the Blood. 81 



18, 10, 7, 15, 6, 5.) It is only discovered a little later in the 

 lymphatic ganglia, although it already occurs in the thoracic 

 duct. It, therefore, would appear, says the author, that there 

 is a direct communication between the arteries and lymphatic 

 vessels. 



9th, The foreign substance introduced into the blood is quick- 

 ly ejected by the secreting organs, especially by the kidneys. 

 The diminution was perceptible after a few minutes, in Exp. 3, 

 4, 8, 15. In from five to eight hours there no longer remain- 

 ed any traces of it in the products of the secretions ; and, in 

 twenty-four hours, all traces had disappeared, even from the so* 

 hd parts (Exp. 13.) 



10th, Lastly, there results from these experiments, that the 

 hydrocyanate of potash and iron may be mixed with the blood 

 without inconvenience to the animal. A solution of indigo has 

 not the same advantage (Exp. 11.) A solution of sulphate of 

 iron injected into the blood coagulates it^ and speedily causes 

 death. 



Account of the Taenia found in the Intestines of the Common 

 Grouse (Tetrao scoticus). By John Scoulae, Esq. Com- 

 municated by the Author. 



The public are indebted to the valuable and interesting ob- 

 servations of Robert Wallace, Esq. of Kelly, for the first infor- 

 mation of the great numbers of worms found in the intestines 

 of the common grouse (Tetrao scoticus) ; and it must be alike 

 interesting to the sportsman and the naturalist, to receive some 

 particulars of the nature of a disease so common during this 

 season, and which has proved so prejudicial to the game. To 

 the kindness and liberality of Mr Wallace, the writer is indebt- 

 ed for many valuable remarks on the subject, and for opportu- 

 nities of examining the bodies of some birds affected with the 

 disease. The birds which labour under it are easily distin- 

 guished from those in a state of health, even while on the wing, 

 by the weakness of their flight, and the languor of their move- 

 ments. On opening some grouse which had been killed in this 

 unhealthy condition, the small intestines were found to contain 



OCTOBER DECEMBER 1828. F 



