A treatise on milch cows : whereby the quality and quantity of milk which any cow will give may be accurately determined by observing natural marks or external indications alone : the length of time she will continue to give milk, &c / by Francis Guénon ; translated for the Farmer's library, from the French, by N. P. Trist ; with introductory remarks and observations on the cow and the dairy by John S. Skinner.