Page:Encyclopædia Britannica, Ninth Edition, v. 9.djvu/479

 VOL. IX. FO RTI FI CATION PLA TE IX. C OA S T BA T TE R Y. CASEMATf SHIELD 9 FT HIGH. i J- 4 b. Half Lovrer Plan. _________ y Half Upper Plan. Section.. Exterior Elevation. ENCYCLOP/f DIA BRITANNICA NINTH EDITION