132 ANNUAL REPORT SMITHSONIAN INSTITUTION, 1947 



available to the Army on location. Ten different chemicals and chemi- 

 cal mixtures were used in the experiment. Stakes 12 inches long were 

 treated by instant dip and by dips of 3 minutes, 1 hour and 12 hours. 

 Ten replications were made of all treatments. All stakes were driven 

 into the soil to a depth of 6 inches. 



A small amount of treated fabrics, conduit, and insulation is now 

 under test, and it is planned that more such material will be tested 

 in the future. In addition, experiments will be conducted to develop 

 methods and materials that might be of value in preventing attack 

 of wood by marine organisms. 



Theodore J. Mabtin, technologist of the Forest Products Labora- 

 tory at Madison, Wis., made several trips to the island in connection 

 with the installation and inspection of the various tests of plywoods, 

 glues, paints, resins, and other materials. Since most of this is covered 

 in the report of Mr. Middleswart, little need be added here. 



It is always a great satisfaction to be able to give tribute where it 

 is due. The thoroughness of Mr. Martin's work, his attention to 

 details, his ability to see and appreciate what too many would not note, 

 all were apparent during his work on the island. 



Mrs. Elizabeth G. Hartmann, of New York City, spent a short 

 time on the island studying the bird life, preparatory to a more ex- 

 tended trip into Costa Rica. The abmidance of life on the island, in 

 addition to the birds, crowded each day with no end of new experiences 

 and information and made her stay all too brief. 



Dr. Alexander Wetmore, Secretary, Smithsonian Institution, 

 spent 2 days and 1 night, all he could spare on his return from Jacque, 

 and his urgent need to be back again in Washington. While all too 

 brief, the period was spent in discussions with the Resident Manager 

 of the island's more urgent needs. 



G. E. Erikson, of the graduate school of Harvard University, spent 

 some time on the island in connection with his research problems on 

 the higher mammals. 



C. C. SoPER, chemist for Eastman Kodak Co., and in charge of their 

 research laboratory in Panama City, initiated and conducted on the 

 island the most varied studies in connection with deterioration and 

 corrosion of practically all the materials that enter into photography. 

 The outcome of these studies means, of course, better results for those 

 who do photographic work. Mr. Soper's investigations dealt not only 

 with corrosion of lenses and its elimination, but also with the proper- 

 ties and keeping qualities of film, particularly color, papers, and other 

 photographic supplies, and also with the matter of packing and pack- 

 aging. It is the first really serious study of these multiple problems. 

 The upper floor of the building built this year is used for these tests 

 and studies. 



