August 4, 1922] 



SCIENCE 



147 



Time 1 min. 3 min. 8 min. 10 min. 



Temperature ....39.25 38.20 34.30 33.0° C. 



Dia. pupil 0.13 0.17 0.34 0.425 In. 



After removal of the adrenals and before 

 adrenal insufficiency had time to develop, 

 induction shocks, asphysia and cold produced 

 little or no effect in the same animals which had 

 previously given good responses with the same 

 stimulation. 



Our evidence points conclusively to an emer- 

 gency function of the adrenal. 



Frank A. Haetman 



Department of Physiology, 

 University of Buffalo 



SEALING QUARTZ TO GLASS WITH SILVER 

 CHLORIDE 



Although silver chloride has long been used 

 as a cement, the possibility of employing it 

 as a cement for vacuum purposes has perhaps 

 not been thoroughly appreciated. Recent tests 

 have demonstrated that the substance possesses 

 certain qualities desirable in a cement, name- 

 ly, it melts at 455° C, a relatively high tempera- 

 ture, it adheres to glass and quartz surfaces 

 and forms a joint that does not leak, it does 

 not give off gas in any quantity, and does not 

 decompose readily with time. By means of 

 the silver chloride quartz windows were sealed 

 to glass mercury vapor lamps and gas dis- 

 charge tubes for use as sources of ultra-violet 

 light. 



The silver chloride was prepared by pre- 

 cipitation from an aqueous solution of sUver 

 nitrate with sodium chloride. The precipi- 

 tate was thoroughly washed, dried, and ground 

 to a powder. To fasten a plate of quartz or 

 other material to a glass tube the following 

 simple manipulation was found workable. The 

 end of the glass tube was ground evenly, 

 warmed above 500°C in a bunsen flame and 

 dipped quickly into the silver chloride powder. 

 This adhered to the glass and upon further 

 heating in the flame melted evenly around the 

 end of the tube. The tube was then clamped 

 in an upright position and the plate laid on 

 the top of it. The bunsen flame was carefully 

 played over the tube and the plate until the 

 silver chloride again melted and crawled into 

 optical contact with the plate. Little difficulty 



was experienced in sealing fused quartz plates 

 to glass tubes, but with plates cut from crys- 

 tal quartz considerable care was necessary to 

 heat them to the required temperature without 

 fracture. Slow even heating by a furnace 

 would have been better than the bimsen flame. 

 It W4S found that if the glass tube was either 

 too thin or too thick it was liable to crack near 

 the seal upon cooling. Glass tubing of medium 

 thickness stood the strain well. Of course in 

 such a seal strains exist because of the different 

 heat expansions of quartz and glass, but the 

 fused silver chloride, being tough and not brit- 

 tle, no doubt yields somewhat and eases the 

 strain. 



e. 0. hulbuet 

 Iowa State University 



THE NORTH CAROLINA ACADEMY 

 OF SCIENCE 



The North Carolina Academy of Science met 

 at the University of North Carolina at Chapel 

 Hill May 5 and 6. Thirty-five new members 

 were added, making a total of 163. The North 

 Carolina Section of the American Chemical 

 Society and the North Carolina Physics Teach- 

 ers' Association met at the same time and place. 

 The following officers were elected: (Academy) 

 President, Dr. A. Henderson, University; vice- 

 president, Dr. H. B. Arbuckle, Davidson Col- 

 lege; secretary-treasurer, Dr. Bert Cunningham, 

 Trinity College; executive committee. Dr. H. N. 

 Gould, Wake Forest College, Professor J. P. 

 Givler, North Carolina College for "Women, 

 Dr. B. W. Wells, State College. (Chemists) 

 President, Dr. A. S. Wheeler, University; sec- 

 retary, Mr. L. B. Ehodes, Raleigh. (Physics 

 Association) President, Dr. A. H. Patterson, 

 University; vice-president, W. T. Wright, 

 North Carolina College for Women; secretary- 

 treasurer, Professor A. L. Hook, Elon College; 

 executive committee, Professoi"s C. W. Ed- 

 wards, J. B. Derieux and A. F. Roller. 



In addition to the address of welcome by 

 President Chase of the university and the pres- 

 idential address, "The search for the ultimate 

 atom," by Professor J. L. Lake of Wake Forest, 

 the following papers were presented: 



The variation of tlie photoelectric current with 

 thicTcness of metal: Otto Stuhlman, Je. 



