William Petty

“ That the Gallon of Milk comes but to a Farthing, expecting what the value and hazard of the Cow, and the labour of milking and looking to her, shall add unto that price; which I suppose not above as much more. ”

“ That a Cow continues Milch and bearing, from 3 or 4 years old to 12, sometimes 20, tho seldom suffer'd to live so long. And that three Dairy-women will manage 20 Cows, and do much work of other kind between while; and that one Man will look to them and their Food.
An Ox of 6 or 7 years old will not require so much feeding as a Milch-Cow, but will be maintained with two Acres of good Pasture only, or with 11⁄2 Acres of Pasture, and 1⁄2 Acres of Hay, in hard Winters.
An Horse requires 21⁄2 Acres, as a Garran, and a small Horse or Irish Garran 12⁄3, or thereabouts. ”

“ Wherefore the Acre of 160 Perches is as 121 to 196, that is 121 Irish Acres do make 196 English Statute Acres. Now in Ireland a Milch-Cow, if English breed, upon two Acres of Pasture, and with as much Hay as will grow upon 1⁄2 Acre of Meadow, will yield præter propter 3 Gallons of Milk for 90 days, one with another, and one Gallon at a Medium for 90 more, and for 90 more scarce 1⁄4 of a Gallon one day with another, and for 90 more, dry. Wherefore it follows, that such a Cow upon such feeding, gives above one Tun and half ”