98 SUMMARY OF CURRENT RESEARCHES. 



Relationship between Dendritic Structure and Ferrite Mesh. — ■ 

 F. GiOLiTTi {Chemical and Metallurgical Engineering, May 1'.', r.>20, 

 22, 921-1)). These investigations were made upon a 2 p.c. open- 

 hearth nickel steel. Both tlie position and the form of the ferrite 

 elements appear to be wholly independent of the position, and also the 

 state, of the system of dendrites. Microphotographs accompany the 

 paper. • F. I. G. R. 



Microstructure of Malleable Cast-iron in relation to its 

 Behaviour under Stress.— R. Stotz {Stahl and Eisen, July 2'J, 1920, 

 40, 997-1002). The appearance of the fracture when subjected to 

 microscopical examination is described, in the case of both correctly 

 and incoiTectly manufactured specimens. F. I. Ct. R. 



Oblique Fracture in Steel, and Segregation. — P. Oberhoffer 

 {>Smhl and Eisen, June 20, 1920, 40, 705-13, 872-8). The author 

 considers the form of fracture to be due to local accumulations of 

 phosphorus. Segregation and means of revealing it by different etching 

 re-agents are discussed, and some particularly interesting microphoto- 

 graphs are appended. F. I. ("x. R. 



Effect of the Addition of other Metals on the Plasticity of Nickel 

 Steel.— C.E.GuiLLAUME {Compter Rendns, June 28, 1920,170, 143o). 

 The effect is described of varying proportions of manganese, chromium , 

 and carbon in nickel steel of known nickel content. F. I. (}. R. 



