16 



TEMPERATURE OF COAGULATION OF PROTEIDS. [BOOK 1. 



TABLE EXHIBITING THE TEMPERATURE AT WHICH SOLUTIONS OF 

 VARIOUS PBOTEIDS, BELONGING TO THE GROUP OF ALBUMINS AND 

 GLOBULINS, COAGULATE. 



II. 



SEC. 3. SYNOPSIS OF THE CHIEF PROTEID BODIES. 



The various proteid bodies occurring in the animal body will be 

 described in connection with the tissues of which each is most charac- 

 teristic; it will be convenient, however, to give a synopsis exhibiting 

 the principles upon which they have been classified. 



CLASS I. Albumins: proteid bodies which are soluble in water 

 and which are not precipitated by alkaline carbonates, by sodium 

 chloride, or by very dilute acids. If dried at a temperature below 

 2 40, they present the appearance of yellow transparent bodies, break- 

 ing with a vitreous fracture, which are soluble in water. 



Their solutions are coagulated when heated to temperatures 

 varying between 65 and 73. 



(1) Serum-albumin. Specific rotation (a) = -56. Not pre- 

 cipitated from its solutions when these are agitated with ether. 



1 Hoppe-Seyler, Handbuch d. phys.- u. path.-chem. Analyse. 



2 Weyl, "Beitrage zur Kenntniss thierischer und pflanzHcher Eiweisskorper." Zeit- 

 schrift f. physiol. Chem. , vol. i, p. 72. 



3 Kiihne, Untersuchungen iiber das Protoplasma und die Contractilitat, Leipzig, 1864, 

 p. 317. 



4 Frederique, "De 1'existence dans le plasma sanguin d'une substance albuminoide 

 se coagulant a + 56." Annales de la Socie'te de Medecine de Gand, 1877. 



Frederique, Recherches sur la constitution du Plasma sanguin, Grand, 1878, p. 25. 

 6 Hammarsten, "Ueber das Paraglobulin. Zweiter Abschnitt," Pfliiger's Archiv, 

 1878, vol. xviii. p. 67. According to the amount of salt present, and the greater or less 



