37 



corresponding number of small cups is placed below the holes 

 to receive the spilt mercury which may afterwards be replaced. 

 The amount of mercury in the cups gives an indication of the 

 direction and roughly of the force of the earthquake shock. 



V. SETS OF MINERALS, ROCKS, FOSSILS AND MICROSCOPIC 

 PREPARATIONS FOR TEACHING PURPOSES. 



106. A cabinet containing geological specimens and 

 apparatus. Recommended by Prof. Judd for the use of 

 science teachers. 



E. 10. 1883. 



A large box with handles and lid, with four trays fitting into 

 it, and containing also geological hammers of two sizes, magni- 

 fying glasses of three powers, and a clinometer. 



The first two trays contain 25 wooden compartments, each 

 3|- in. by 4J- in. The first contains the following igneous rocks : 



1. Granite, High Downs, Crowan, Cornwall. 



2. Granite, Aberdeen. 



3. Granite, Shap, Westmoreland. 



4. Quartz felsite, Drem, Crowan, Cornwall. 



5. Granite (China stone), S. Austell. 



6. Rhyolite, Bartos, Hungary. 



7. Pitchstone, Corriegills, Isle of Arran. 



8. Obsidian, Lipari Isles. 



9. Pumice, Lipari Isles. 



10. Rhyolite tuff, Glashiitte, Schemnitz, Hungary. 



11. Syenite, Dresden, Saxony. 



12. Elceolite Syenite, Brevig, Norway. 



13. Diorite, Freiberg, Saxony. 



14. Trachyte, Drachenfels, Rhine. 



15. Hornblende Andesite, Stenzelberg, Rhine. 



16. Hornblende Porphyrite, Potschappel, near Dresden, 



Saxony. 



17. Clay stone, Braid Hills, Pentlands. 



18. Phonolite, Aussig, Bohemia. 



19. Gabbro, Penig, Saxony. 



20. Basalt, Giant's Causeway, Ireland. 



21. Basalt, Magospart, Hungary. 



22. Melaphyre (amygdaloidal), Heimbach, Nahe. 



23. Palagonite tuff, Limburg, Nassau. 



24. Serpentine, Lizard, Cornwall. 



25. Greisen, Zinnwald, Bohemia. 



The second contains the following stratified rocks : 



26. Pipe clay, Corfe Castle, Purbeck, Dorset. 



27. Coal shale, Water of Leith, Edinburgh. 



