26 James Mann : 



Change of Colour during Drying. 



Diiriiifr the drying operation all the boi'ings changed colour. 



Ulabo changed from a yellowish brown to a bluish chocolate. 



Alaga, from a pinkish brown to a deeper shade. 



Kokoilo, to a purplish brown. 



Madave, to a decided brown. 



Tamanau, to a light brown : and 



Ilimo^ to a rather duller grey with a yellowish tinge. 



Bending Experiments. 



A series of six pieces from each of the varieties was sub- 

 mitted to a serv^ere bending test. The apparatus, designed by 

 the author and used for these tests, is illustrated in Fig. 1, Plate 

 X. 



A, is the steaming chamber. B, the boiler. C, condenser. F, 

 funnel for filling the boiler. H, the steam pipe leading to the 

 steam chamber from the boiler. T', the thermometer to watch 

 the rise of temperature in the chamber. T, the tube around 

 which the specimen is to be bent. W, the weight of ten pounds. 

 P, a pointer, which is attached to the weight at right angles, so 

 that it is always horizontal. J, a jockey clip which is bored 

 for a pin to carry the weight. The clip is attached to a piece 

 of spring brass which rests on the specimen when being bent. 

 S is the specimen, and a is the angle iron under which one end 



