Trans. Roy. Dubl. Soc, Ser. II., Vol. VJI. 



Plate XXXIV, 



-Staff. Cross, Soale, and Level I'ublile, photographed 

 through instrument shown in Fig. 8. 



Fig. ,s. — Photograph of Hand Level in nse. 



Fig. h. — Photograjih of Prismatic Compass in use. 



M 'Fdilane & Erskine. Edir 



