13 



Lung-s and Ovipositor of Spider 

 (Epeira diadema) 



Pond Life... 



Electrolysis of Stannous chloride 



Aulacodiscus grandis ... 



Fern Sori... 



Radiolaria 



Crystals under polarised light 



Gorgonia spicules 



Insect structure ... 



And others 



J. Gould. 



W. E. Harper. 



J. A. Henderson. 



E. Leonard. 



JAS. D. Macphail. 



J. T. Norman-Thomas. 



E. O. Pritchard. 



Wi. H. Read. 



C. H. Hesketh-Walker. 



