220 Hohart Town considered with 



AP PENDIX. 



EXPLANATION OF THE PLATES. 

 Plate I. — Represents tlie Town and its neiglibourlioody sur- 

 rounded by works varying according to circumstances. 



The red figures denote the different works. 



O An American block-house. 



-|- One in form of a cross or smaller. 



y\ f \ / \ Batteries or other continuous lines of pai*apet. 



Q Martello towers or block-house in lieu thereof. 



[[1 Lines of fortified hedge loop-holed walls, &c. &c. 



Plate II., fig. cci of which fig, J is a section, is a battery of 

 one face with i-eturns. The parapet of the battery is 18 feet, to 

 resist a 24-pounder; but that of the return is only 12 feet. 

 Fig. c is the elevation of a loop-holed wall. Fig. d are sections 

 of different cases. Fig. e a tarnhouse over a window. Fig. / 

 shows five cases of foi-tifying hedges. 



Plate III., fig. 01 is the plan of a cruciform musketiy block- 

 house. Fig. h is its section and elevation. Fig. i is the section 

 of a block-house to resist artillery, having its bomb-proof formed 

 into a parapet. The dotted lines show how a swivel gun may 

 here be used. Fig. k is Capt. Macauley's economical block-house, 

 and fig. I the plan, and fig. m the elcA^ation of an American 

 block-house. 



Plate IV., figs. ?2 j9, are respectively the section, plan, and 

 elevation of a Martello Tower. Fig, ^r is a two-stoi'ied dwelling, 

 house fortified, and fig. r a single story cottage, with verandah 

 in like condition. 



