It will thus be seen, Guenon divided his bulls into three classes: The good, the mediocre, and the bad. He also divided them into three sizes: The high, the medium, and the low. But he makes no difference between the three sizes of bulls in his description of the escutcheon. He describes each one of the three principal orders, leaving to the practitioner to determine the intermediate degrees between the good and the mediocre, and between the mediocre and the bad. We do not repeat his descriptions, as they are based upon those of the cows of the same classes, and the engravings tell the whole story. We reproduce the engravings of the good and mediocre. But very occasionally is one of the “rare” ones observed, but he says the Curved-line is the most usual, then the Limousine, and lastly the Horizontal. What we give is quite sufficient for all practical purposes. We advise all to carefully select their breeding animal, which will, in most cases, be from among what he calls the “mediocre.” [Illustration: _Class I.—Flanders Bull._] [Illustration: _Class II.—Left Flanders Bull._] [Illustration: _Class III.—Selvage Bulls._] [Illustration: _Class IV.—Curveline Bulls._] [Illustration: _Class V.—Bicorn Bulls._] [Illustration: _Class VI.—Double Selvage Bulls._] [Illustration: _Class VII.—Demijohn Bulls._] [Illustration: _Class VIII.—Square Bulls._] [Illustration: _Class IX.—Limousine Bulls._] REPORT OF THE PENNSYLVANIA GUENON COMMISSION. At the annual meeting of the Board held January 2, 1878, it was “_Resolved_, That the president of the Board (His Excellency Governor John F. Hartranft) be authorized and requested to appoint a commission of experts, who shall inquire into and report upon the reliability of the Guenon or escutcheon theory for selecting milking stock; said report to be made to the secretary of the Board on or before the 1st of November next.” In accordance with this request, His Excellency Governor Hartranft issued the following commission: COMMONWEALTH OF PENNSYLVANIA, EXECUTIVE CHAMBER, HARRISBURG, _April 24, 1878_. To GEORGE BLIGHT, Esq., _of the city of Philadelphia_; CHALKLEY HARVEY, Esq., _of the county of Delaware_, and WILLIS P. HAZARD, Esq., _of the county of Chester_: GENTLEMEN: I have the honor to inform you that you have been duly appointed a committee by the State Board of Agriculture to investigate and test “The Guenon Milk Escutcheon Theory,” and report the result thereof to the secretary of said Board. JNO. F. HARTRANFT, _Governor and President of the Board_. _November 1, 1878._ To the Honorable JNO. F. HARTRANFT, _Governor and President of the Board of Agriculture_: