it cannot be too earnestly urged that an acquaintance with real facts will in the end be better for all parties some time ago when the reading public was alarmed at being told how london milk is adulterated timid persons deprecated the exposure on the plea that it would give instructions in the art of adulterating milk a vain fear milkmen knew all about it before whether they practiced it or not and the exposure only taught purchasers the necessity of a little scrutiny and caution leaving them to obey this necessity or not as they pleased