CHAP. II.] VARIOUS ALBUMOSES. 133 



admixtures : (2) nor by a 2 per cent, solution of copper sulphate : 

 (3) nor when their neutral solutions are saturated with sodium 

 chloride. (4) Phospho-molybdie and phospho-tungstic acids pre- 

 cipitate the primary albumoses completely, but the secondary incom- 

 pletely (?) According to Neumeister, hetero-albumose is related to 

 anti- as well as to the hemi- moiety of the proteid molecule ; by a 

 subsequent hydration he supposes it to yield an ampho-deutero-albu- 

 mose, i.e., a 'deutero-albumose in which both hemi- and anti-mole- 

 cules are still present and which on final hydration will yield both 

 hemi- and anti-peptone 1 . 



Classification The researches of Kiihne and Chittenden, of Neu- 

 f 3 iS^ nOS t S me ^ ster an d others, have shewn that, corresponding to 

 t&eir origin each of the principal proteid s and also corresponding to 

 several of the albuminoid substances, by the action of 

 hydrolytic agents and especially of the digestive enzymes, bodies 

 can be obtained which agree in their relations, and resemble for 

 the most part very closely both in physical properties and chemical 

 characters, the albumoses which have been described. Terms have 

 been devised to designate these bodies, which serve to indicate 

 their origin. Thus Kiihne and Chittenden have described globuloses 2 ; 

 Chittenden and Painter caseoses 3 ; Neumeister vitelloses 4 ; Kiihne 

 and Chittenden myosinoses 5 ; Chittenden and Hart elastoses 6 these 

 being the albumoses corresponding to globulin, casein, vitellin, 

 rnyosin and elastin respectively. Similarly proto- and deutero- 

 albumoses corresponding to the several bodies have received the 

 names of proto-globulose, deutero-globulose, proto-myosinose, deutero- 

 myosinose, &c. 



It has been suggested, by Halliburton 7 , that the albumoses, conjointly, 

 should be designated proteases. It appears to the author that no ground 

 whatever exists for adding a fresh name to the cumbersome list of those 

 already suggested, especially as the term proteose is non-suggestive of the 

 origin of the bodies to which it is desired to apply it, and is certain to 

 mislead : inasmuch as the Greek numeral adjectives having served as pre- 

 fixes to distinguish the different albumoses, the suggested term proteoses is 

 likely to be assumed, by many, to refer to the proto-albumoses, as dis- 

 tinguished from the deutero or hetero-albumoses, rather than as distinguish- 

 ing the albumoses from the true peptones. 



1 Neumeister, Zeitschrift fur Biologic, Vol. xxvi. p. 57. 



2 Kiihne and Chittenden. Zeitschrift filr Biologic, Vol. xxn. p. 409. 



3 R. H. Chittenden and H. M. Painter, Casein and its primary cleavage products.' 

 Studies from the Laboratory of Physiological Chemistry of Yale College for 1885 1886, 

 p. 156. 



4 R. Neumeister, ' Ueber Vitellosen.' Zeitschrift filr Biologic, Vol. xxm. p. 2. 



5 Kiihne and Chittenden, ' Myosin und Myosinosen.' Zeitschrift fiir Biologic, Vol. 

 xxv. (1889) p. 358. 



6 R. H. Chittenden, u. A. J. Hart, 'Elastin und Elastosen.' Zeitschrift fiir 

 Biologic, Vol. xxv. (1889), p. 368. 



7 Halliburton, ' A text book of Chemical Physiology and Pathology.' London, 

 Longman and Co., 1891. 



