96 



SCIENCE 



[N. S. Vol. XXVIII. No. 707 



" On the Pharmacology of the Iodides," by L. 

 B. Stookey and Vera Gardner. 



" Glycogen Formation from Arabinose in 

 Chicks," by L. B. Stookey and A. Halden Jones. 



" Is Oxalic Acid a Product of Hepatic Uricolysis 

 in Man? " by L. B. Stookey and Ethel L. Leonard. 



" The Life Cycle of Paramecium," by Lorande 

 Loss Woodruff. 



" An Examination of Bardach's New Protein 

 Test," by Emily C. Seaman and William J. Gies. 



" A Study of Metabolic Effects of Experimental 

 Polycythemia in Dogs," by William Weinberger 

 (by invitation). 



" On the Metabolic Influence of Magnesium Sul- 

 fate in Dogs, with Special Reference to the Par- 

 tition of the Nitrogenous Constituents of the 

 Urine," by Matthew Steel (by invitation.) 



" On the Determination of Ammonia, by the 

 EoUn Method, in Urines containing Crystalline 

 Ammonio-magnesium Phosphate," by Matthew 

 Steel and William J. Gies. 



William: J. Gies, 



Secretary 



THE GEOLOGICAL SOCIETY OP WASHINGTON 



At the 206th meeting of the society Mr. C. W. 

 Wright presented a " Brief Discussion of the 

 Copper Deposits of Kasaau Peninsula, South- 

 eastern Alaska." He first stated briefly the gen- 

 eral geology of Kasaan Peninsula and then de- 

 scribed the occurrence of the copper and its pos- 

 sible origin. Greenstone lavas, tuffs, conglom- 

 erates, sandstones and limestones constitute the 

 stratified rocks and intruding these are batho- 

 lithic masses of granodiorite. Granite and syen- 

 ite dikes invade the granodiorite and in turn are 

 cut by dikes of porphyry, felsite, diabase and 

 basalt. Three types of ore deposits are recog- 

 nized : ( 1 ) Chaleopyrite-magnetite deposits asso- 

 ciated with amphibole, epidote, garnet and ortho- 

 clase, and occurring as irregular masses 10 to 

 300 feet in dimensions along the contacts of the 

 intrusives. (2) Chalcopyrite-pyrite-sphalerite 

 deposits associated with quartz and calcite and 

 occurring in fissures or sheer zones 5 to 10 feet 

 wide in the greenstone tuffs. (3) Galena-sphaler- 

 ite-ehalcopyrite and tetrahedrite deposits associ- 

 ated with quartz calcite and barite and occupying 

 fissures 2 to 8 feet wide in the limestones. The 

 first type are commercially the most important, 

 and were described more fully. The facts relative 

 to the origin of these contact metamorphic deposits 

 are : ( 1 ) that a considerable transfer of material 

 to local points at the intrusive contacts took place, 



(2) that the ore-bodies were deposited after the 

 solidification of those portions of the adjacent 

 intrusives now exposed, (3) that the minerals 

 contained are those which form at relatively high 

 temperatures from gaseous or aqueous solutions, 

 (4) that the contacts of the intrusives have been 

 favorable localities for the passage of these solu- 

 tions. Though the source of these mineral solu- 

 tions is hypothetical they are believed to have 

 been derived from an underlying magma and 

 probably the same magma from which the grano- 

 diorite, granite and syenite were ejected. Evi- 

 dence tends to show that the origin of the cop- 

 per deposits can not be attributed directly to the 

 adjacent intrusive rocks and that both the in- 

 trusive and intruded enclosing rocks have played 

 but a passive role in their formation. Their 

 genesis is referred to an underlying igneous 

 magma from which the greater portion of the 

 material composing the ore deposits was ejected 

 in a gaseous or aqueous state at a period subse- 

 quent to the ejection of the intrusive rocks with 

 which the copper deposits occur. 



Ralph Aenold, 



Secretary 



THE AMERICAN INSTITUTE OP CHEMICAL ENGINEEBS 



The American Institute of Chemical Engineers 

 was organized on June 22 at the Engineers' Club 

 of Philadelphia. The following ofiicers were 

 elected for a term expiring at the nest regular 

 meeting, which will be held in December: 

 President — Samuel P. Sadtler, Philadelphia, Pa. 

 First Vice-President — Charles F. McKenna, New 



York City, N. Y. 

 Second Vice-President — H. Aug. Hunicke, St. 



Louis, Mo. 

 Third Vice-President — E. G. Acheson, Niagara 



Falls, N. Y. 

 Treasurer — William M. Booth, Syracuse, N. Y. 

 Secretary — John C. Olsen, Brooklyn, N. Y. 

 Auditor — Richard K. Meade, Nazareth, Pa. 



Directors were elected for terms of one, two or 

 three years as follows: 

 One year — Ludwig Renter, Berkeley, Cal. ; Thorne 



Smith, Isabelle, Tenn. ; H. P. Brown, Wilming- 

 ton, Del. 

 Two years — J. M. Camp, Duquesne, Pa. ; Charles 



A. Catlin, Providence, R. I.; Eugene Haanel, 



Ottawa, Canada. 

 Three years — George P. Adamson, Easton, Pa.; 



David Wesson, Wilmington, Del. ; Edward Gude- 



man, Chicago, 111. 



David Wilbtjb Horn, 

 Secretary pro tern. 



