6 



20. Models of crystals in wood (40). f in. size. To 

 illustrate Ansted's " Elementary Course of Mineralogy." 



1857. Exhibited by J. R. Larkin. 



21. Models of crystals in wood (25). -| in. size. To 

 illustrate Fownes' Elementary Chemistry. 



1874. Exhibited by J. E. LarUn. 







22. Models of crystals in wood (31). 1 in. size. In 

 mahogany box. To illustrate the section on crystal- 

 lography in Orr's " Circle of the Sciences." 



1873. Exhibited by J. E. Larkin. 



23. Models of crystals in wood (55). 1 in. size. To 

 illustrate Pereira's " Materia Medica." 



1874. Exhibited by J. E. Larkin. 



24. Models in wood (36). 2 in. size. .Representing 

 different crystalline forms belonging to the cubic system, 

 Made at Brussels. 



E. 113. 1862. Presented by the Belgian Government. 



25. Models of crystals in wood (26). f in. size. 



E. 94. 1857. Made by Hachette $ Co. 



These belong to the various systems, and are so fixed in a box 

 that all their crystallographic axes are, as far as possible, parallel 

 to each other throughout. 



26. Models of crystals similar to No. 25, both 

 in specimens and method of fixing, only the order is 

 different. 



E. 107. 1862. Presented by the Belgian Government. 



27. "Wooden models of crystals, 80 of large size, in 

 compartments 3^ in. by 2^ in., in two trays contained in 

 a box. By Stroukoff. 



E. 749. 1877. 



From the Pedagogical Museum, St. Petersburg. 



E. Models in Cardboard. 



28. Collection of models of the cubic system of 

 crystallography to a scale of three inches for the cir- 



