CONTENTS 
Nhistroioticials® a= asso ee ee ae ee ee a eee eta ee ere eee 
CRAMER AIRS CALC IC ING tee eee eee ea ce ee a san ae 
Interdepartmental Committee on Scientific Research and Development__-_ 
PehevestaloliShim em (iene oy eee ae eerie ape ental a oe eae ae 
RhesBboardroimilvegentSeaes see aa ee ee a ee ee eee ee eee ces 
WGN Ata CS ep ee ene =p eee aera eS ean ese 
AD prOpHations see = ae mes een Bore 22 eee oe ee eece= 
WASICORS Eee ye Seti 2 en ERs FoR ee Reee Sam a So Se ea ee 
RifteenthvArthuplecturesses-ee= 55-4 ease os 2 ese see ee es 
Summary of the year’s activities of the branches of the Institution_____-_ 
JPXDIL OY DOPE CVO 2 ce a as een ees 
Tbilorsirey see 2 De 2S pie ares Se Sp a TE eee ht ee ee Sig 
Appendix 1. Report on the United States National Museum_-_-_----_---- 
Report on the National Gallery of Art__...______-.-_-_--_-- 
Report on the National Collection of Fine Arts__________--_ 
Report onthe: Freer Gallery of: ArtuJsi23_. =. sel 32. Aye ee 
Report on the Bureau of American Ethnology_____-_-_---- 
Report on the Internationa] Exchange Service___-_-------- 
- Reporvon the National) Zoological Parke ss2e2 22a see See 
Report on the Astrophysical Observatory___-_-_---------- 
Reportion the NationalvAin Museumeet 2262 Seen eee 
. Report on the Canal Zone Biological Area_______---------- 
AGI SReport OMythe liar ys k ee ee ee ae Foe toe or Boag oe ayers ce 
PZ, IRAN OM juloos soo ee eee es ee 
Report of the executive committee of the Board of Regents___-_-------- 
_ 
SO SAS Se ioe 
GENERAL APPENDIX 
The Astrophysical Observatory of the Smithsonian Institution, by C. G. 
Acomicreneroysinvindustry, bys He AS Wihiels === esse] esse eee eee 
High-altitude research with V—2 rockets, by Ernest H. Krause________-- 
Roentgen rays against cancer, by John G. Trump_____________-_____-- 
The optical glass industry, past and present, by Francis W. Glaze__-__-- 
hevageof the earthyby Arthur Holmési <2. = -- 2.2.2.2 5.5252 22- 
Petroleum resources of North America, by A. I. Levorsen____._________- 
American meteorites and the National collection, by E. P. Henderson___- 
Glacial varved clay concretions of New England, by Ray S. Bassler_____-_ 
Algal pillars miscalled geyser cones, by Roland W. Brown____-_-_------ 
Concepts in conservation of land, water, and wildlife, by Ira N. Gabrielson_ 
The evolution and function of genes, by A. H. Sturtevant___.________-- 
dihe-sense organs of birds,’ by Rs J. Pumphrey—.. 22-2) 22. eee 
acl 
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