“Remarkable as was M. Guenon’s method, and although his discoveries were duly made known in this country, this is the first time that his methods have been compiled for practical use. By the use of this little handbook, there can be no doubt, but that farmers and stock raisers would save a vast amount of money. The explanations are simple and easily followed, the numerous illustrations serving to elucidate the text.”—_Boston Evening Traveler._
“Beginning with a little sketch of the method of the birth of the system in Guenon’s mind, the author goes on in a clear and concise manner to explain by plain language and appropriate drawings, the various so called ‘milk mirrors’ and their values, being properly understood, as aids in selecting good dairy stock. The various opinions of those adverse to the ‘theory’ are fairly discussed, and the reports of various agricultural societies which have from time to time investigated it are given, together with the report of the Pennsylvania commission. Taken altogether, Mr. Hazard has succeeded in making a very readable, interesting and valuable book, and one which, whatever may or may not be the preconceived ideas of its reader, cannot fail to interest and instruct him upon a subject which should be far better understood amongst farmers generally, than it at present is.”—_New England Homestead._
“A very valuable pamphlet. Mr. Hazard has devoted great attention and study to the subject, with a view of rendering the system popular, and we happen to know that his work is largely appreciated, especially by the farmers of New England, from the number of orders received for the book. The discovery made by Mr. Guenon, and the practical principles founded on it are invaluable, and the saving to the country by its general knowledge will be very great. The State of Pennsylvania, in 1878, appointed a commission to test the system and report on it. Mr. Hazard was a member of the commission, and has added the results of much study and research. He has been invited to lecture and present the subject at the annual meeting of the Massachusetts State Board of Agriculture, at Greenfield, and has many invitations and engagements in other places.”—_Massachusetts Ploughman._