556 



SCIENCE 



[N. S. Vol. XXVII. No. 692 



protein raolecule with lecithins (lecithans, 

 phosphatids). 



III. Derived Proteins. 



1. Primary Protein Derivatives. — Deriva- 

 tives of the protein molecule apparently 

 formed through hydrolytic changes vehich in- 

 volve only slight alterations of the protein 

 molecule. 



(a) Proteans. — Insoluble products which ap- 

 parently result from the incipient action of 

 water, very dilute acids or enzymes. 



(b) Metaproteins. — Products of the further 

 action of acids and alkalies whereby the mole- 

 cule is so far altered as to form products 

 soluble in very weak acids and alkalies, but 

 insoluble in neutral fluids. 



This group will thus include the familiar 

 " acid proteins " and " alkali proteins," not 

 the salts of proteins with acids. 



(c) Coagulated Proteins. — Insoluble prod- 

 ucts which result from (1) the action of heat 

 on their solutions, or (2) the action of alco- 

 hols on the protein. 



2. Secondahy Protein Derivatives.' — Prod- 

 ucts of the further hydrolytic cleavage of the 

 protein molecule. 



(a) Proteoses. — Soluble in water, uncoagu- 

 lated by heat, and precipitated by saturating 

 their solutions with ammonium sulphate or 

 zinc sulphate.' 



(b) Peptones. — Soluble in water, uncoagu- 

 lated by heat, but not precipitated by satura- 

 ting their solutions with ammonium sulphate." 



(c) Peptids. — Definitely characterized com- 

 binations of two or more amino acids, the 

 carboxyl group of one being united with the 



' The term secondary hydrolytic derivatives is 

 used because the formation of the primary deriva- 

 tives usually precedes the formation of these sec- 

 ondary derivatives. 



• As thus defined, this term does not strictly 

 cover all the protein derivatives commonly called 

 proteoses, e. g., heteroproteose and dysproteose. 



" In this group the kyrins may be included. 

 For the present we believe that it will be helpful 

 to retain this term as defined, reserving the ex- 

 pression peptid for the simpler compounds of 

 definite structure, such as dipeptids, etc. 



amino group of the other, with the elimination 

 of a molecule of water." 



EussELL H. Chittenden, 

 Otto Polin, 

 William J. Gies, 

 Waldemar Koch, 

 T. B. Osborne, 



For the American Society 

 of Biological Chemists 

 T. B. Osborne, 

 P. A. Levene, 

 J. A. Mandel, 

 A. P. Mathews, 

 Lafayette B. Mendel, 



For the American, Physi- 

 ological Society 

 Chicago, 

 December 31, 1907 



ORQANIZATION OF A UTAH ACADEMY 

 OF SCIENCES 



At a meeting of the Utah science teachers, 

 held in Provo during the holidays, steps were 

 taken toward the organization of a Utah 

 Academy of Sciences. After an informal 

 discussion of some length Dr. Ira D. Cardiff, 

 professor of botany. University of Utah, was 

 elected president and Mr. Geo. W. Bailey, of 

 Weber Academy, secretary. A committee was 

 appointed to draft a constitution and arrange 

 for a future meeting. The committee was 

 composed of the president and the following: 

 Dr. J. A. Widtsoe, president of the Agricul- 

 tural College; Dr. S. H. Goodwin, president 

 of the Proctor Academy; Dr. W. C. Ebaugh, 

 professor of chemistry. University of Utah; 

 Dr. D. E. Ball, professor of zoology. Agricul- 

 tural College; Dr. John SundwaU, professor 

 of anatomy. University of Utah; Dr. L. H. 

 Hartman, professor of physics. University of 

 Utah; Professor Marcus E. Jones, botanist. 

 Salt Lake City; Mr. Eobert Forrester, geolo- 

 gist. Salt Lake City; Mr. Ernest M. Hall, in- 

 structor in biology, L. D. S. High School; 

 Mr. A. O. Garrett, instructor in botany. Salt 

 Lake High School. The conunittee met in 

 Salt Lake City in February, arranged for a 



" The peptones are undoubtedly peptids or mix- 

 tures of peptids, the latter term being at present 

 used to designate those of definite structure. 



