An Estimate of Ordnance, Ammunition, &ca necessary for the Siege of New York, comprehending an operation by Long Island, upon similar principles to the estimates made for the same purpose in the three preceeding years—the shots and shells conformable to the ordnance in possession.

York Island and its communications
Cannon—			Mortars—			Howitzers—
12	pounders	20	5 1/2	inch	20
18		45	10		18	5 1/2	inch	6
24		6	13		4	8		12

	Long Island and its communications
Cannon—			Mortars—			Howitzers—
18	pounders	20	5 1/2	inch	6
24		3	8		3	5 1/2	inch	12
24 light;	which may answer		10		4	8		3
	many purposes	3	13		2

Aggregate
	Cannon	12	pounders	20
		18		65
		24		12
	Mortars	5 1/2	inch	26
		8		3
		10		19
		13		6
	Howitzers	5 1/2	inch	12
		8		15

Shots					Shells
	12	pounders	15000			5 1/2	inch	26000
	18		65000			8		20000
	24		20000			10		20000
						13		3000

Fifty tons 12 & 16 ounce shots for the mortars and howitzers

			Paper Cartridges
Cannon					Mortars and Howitzers
	12	pounders	15000			5 1/2	inch	26000
	18		65000			8		20000
	24		20000			10		20000
						13		3000

				Powder
Cannon
	12	pounders,	15000	rounds	at	4	pounds each	=	60,000
	18		65000			6			390000
	24		20000			8			160000
										610,000
Mortars and Howitzers
	5 1/2	inch,	26000	rounds	at	2	pounds each	=	52000
	8		20000			4			80000
	10		20000			6			120000
	13		3000			12			36000
										288,000
										898,000
									for contingencies	100,000
									pounds	998 000

Cannon cartridge paper for extra service	100 reams
Old Junk for spun yarn to make wads	20 tons
Two inch oak plank for platforms	30000 feet

The cartridge boxes in general are old, and in case of an active campaign ought to be replaced with new ones—say	15,000.
at any rate, there ought to be five thousand to replace the bad ones.
Musket cartridges for 15000 men, each to have three sets of 40	1800,000

The arms in general, it may be presumed, will last throughout another year. Deficiencies can be replaced with the new arms, of which there are about five thousand in store.

There are also in store Ten thousand damaged arms, most of which could be repaired—but there is not one armorer for that purpose.

Observations

I have been constrained to place a great number of 18 pounders in the estimate, we having but very few of larger calibres. The effect cannot be so great from them as from 24 or 32 pounders, the force being in proportion to the weight of the shot. But as we cannot obtain the larger sizes, we may have great confidence in those which are specified. [The] 12 pounders may answer for some of the communications.

All the cannon, mortars and howitzers, are in possession, at West Point and Philadelphia—it being presumed those which were left at York Town have been brought to the last mentioned place. In addition to those specified, twenty or thirty heavy pieces might probably be of great service. But as we have in our former designs obtained all the cannon that the neighbouring States would, upon the most pressing requests furnish, it is thought unnecessary to add a [   ] that cannot be procured.

In case of a combined French and American force, we might be relieved from the operation of Long Island—in which case, the ordnance in the estimate would, it is presumed, be amply sufficient for York Island and its appendages.

In the former general estimates it was observed that there were many other articles which would be wanted for a siege—particularly an immense laboratory preparation of fuzes, [potr]fires, tubes [for] fireballs, carcasses; cordage, canvass &c. &c. all of which I would prefer to have made immediately under my own direction at this place. Particular estimates for the materials, which will be very considerable, may as occasion shall require be presented to Your Excellency, and the Minister of War.

I should have been happy to have laid before Your Excellency, in one view, the articles demanded—those on hand—and the deficiencies. But as I have no return of any stores at Philadelphia or South of it, or any place Eastward of this River, I am consequently incompetent to the task. It can however be obtained from the War Office. I have annexed the returns of the shots and shells at Hibernia, Mount Hope and Pompton furnaces in Jersey, and at Salisbury in Connecticut. These are considerable magazines and the returns are of a late date. There are very large quantities of shots and shells in Pennsylvania and Maryland.

Report of Shots and shells,

at the places hereafter mentioned.

Hibernia.				Pompton .
shells	10	inch	2601		shells	8 inch	371
Carcasses	10	inch	488			5 1/2	398
shots	18	pounders	2040		shots	18 pounders	735
	12		3162

Mount Hope.				Salisbury.
shells	10	inch	2506	shells	8	inch	5008
	8		5010		5 1/2		6000
	5 1/2		5643	shots	18	pounders	5000
					24		1300

Total
	Carcasses	10	inch	488
	shells	10	inch	5107
		8		10389
		5 1/2		12041
	shots	24	pounders	2606
		18		14443
		12		3387