The Tfood is verj heavy, vreighinp; 63 pounds per cubic foot vihen air dry. Its 

 strength properties approach those of Greenheart as shown in Table 1. The 

 wood is highly decay resistant but prone to split and check upon weather- 

 ing. In addition to the marine boi'er res j, stance shown in these tests. 

 Black Kakeralli was only lightly attacked during 2k months of exposure to 

 marine borers in Hawaii (U). Its strength, resistance to decay, and re- 

 sistance to marine organisms ada.pt this r.'ood to heavy durable construction 

 both above water and submerged, -^hen used as piling it may be desirable 

 to cap the butt end to avoid splitting, 



Acknovjledgmen t s 



Acknowledgment is gratefully extended to the various laboratories whose 

 reports have been furnished an important part of the data presented in 

 this paper. Particular personal aclcnowledgment is due to \i. T, Mathis, 

 R. A. Botsford, and Helen Kocaba, of the Connecticut Agricultural Experi- 

 ment rotation, for analyses of the ash of a considerable number of these 

 woods and to George T. Tso\miis, a graduate student at the Yale School of 

 Forestry, who contributed much of the data on total ash content. 



Bibliography 



1, Clapp, .'illiam F. , Laboratories. Tropical wood marine borer tests, 

 Kure Beach, North Carolina. (Reports on vrork sponsored by the Bureau 

 of Ships, Na-/y Dept., Washington,) Progress Report No, 1, Feb. 1, 

 19h9; No. 2, Dec. 30, 19h9; No. 3, Dec. 30, 19h9 » 



2, Clapp, ./illiam F., Laboratories. Tropical v;ood marine borer tests. 

 Harbor Island, North Carolina. (Reports on vxork sponsored by the 

 Bureau of Chips, ■ Na\ry- Dept,, .'.ishington.) Progress Report No, h, 

 July 1950; No. S, Dec. 23, 1950; No. 6, Sept. 17, 19?1. 



3, Dickinson, Fred E., Hess, Robert '., and 'Tangaard, Frederick F. 

 Properties and uses of tropical woods, I, Tropical Yfoods 9^-1-lhS' 

 June, 19U9, 



U, Edmondson, Charles Howard. Reaction of woods from South American and 

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 Forester 10: 1: 37-Ul. January 19l49. 



5, Hess, Robert ¥., Wangaard, Frederick F,, and Dickinson, Fred E, 

 Properties and uses of tropical woods, II, Tropical '.foods 97: 1-132. 

 November 19 50. 



6, Record, Samuel J., and Hess, Robert .T, Timbers of the New 'fforld . 

 Yale University Press. Pp. 6i|0. 19^3, 



7, Wangaard, Frederick F. Tropical woods research at Yale University, 

 Report of Symposium on Wood. National Research Council— Off ice of 

 Naval Research, pp. 26U-303. '-Washington, D. C. October 19ii9. 



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