Proc. Yopksh, Geol. & Potyt. Soc, Vof. tX.. PI. 15. 
Fig. 9. Morgan Lamp, ^. 
• Fig. 11. Evan Evans, i, 
with Automatic " Shut off.' 
Fig. 10. Morgan, Section, ^. 
Fig. 12. Clifford Lamp, i. 
