SERVICE OF ARTILLERY

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M M: finally, the mortar battery H enfilades the face N Q_.as well as the interior of the bastion. ,

If there be a cavalier, tenaille or fausse-braie, so as tomake R a double flank, the number of mortars should beincreased.

. All the dispositions here laid down for attacking the bodyof a place, are equal applicable to the attack of a more ex-tended front, whether covered with horn or crown-works.

67. With counter-guards before the bastions and ravelins,the batteries in breach should be constructcu in such a mannerthat after the eounter-guards are reduced, the guns may bearon the works they covered, in cafe the profiles of the coun-ter- guards are too narrow to admit of the third batteriesbeing erected on them. Thus, batteries should be erected atA, B (PI. 3.) to open a breach at CC corresponding to the partKK of the face of the ravelin; and other batteries at D, E toopen a breach at F F corresponding to the part LL of the faceof the bastion. The collateral batteries should be erectedagreeable to the preceding maxims; one at G to bear upon theflanking part I; and another at H to bear upon M. Whenthe besieger after getting poslession of the eounter-guards,finds himself under the necessity of constructing a battery atN to ruin the defences O of the breach K K and another atP to ruin the defences Q_of the breach L L, and the coun-ter-guards are so narrow that the guns cannot be brought upthrough the breaches C C, F F to the respective batteriesN, F; he must construct four others on the crest of theglacis; viz. one at R to make a breach at N where theguns may be got up, and a collateral battery at S to ruin thedefences T ; a third at V to make a breach at P in order toget up the guns ; and a collateral battery at X to ruin the de-fences at Z. Under this supposition, the number of gunsfor batteries on the crest of the glacis, will far exceed thenumber requisite for the first batteries; which must be allowedfor in making up the proportion of stores (28).

The rules given for the mortar batteries will be equally ap-plicable to this as the preceding cafe (64), and will give thefame position Y.

68. The batteries constructed on the crest of the glacisare always funk, since the lodgements made there form aparapet. It should never be less than 20 feet thick ; and forgreater solidity the interior part should be faced with fascines.The distance between every two guns is 20 feet, independent

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