He who would preach the Gospel with power must be himself a believer in the Lord. The secret of true, heart-stirring eloquence in the pulpit is, next after the power of the Holy Ghost, that which the French Abbé has very happily called “the accent of conviction” in the speaker. Behind every appeal that Paul made to sinners, there was the memory of that wonderful experience through which he passed on the way to Damascus; and therefore we are not surprised that he _so_ preached as either to secure men’s faith or to rouse their antagonism. But his conversion alone, without his Arabian revelations, would not have made him the apostle he became. In the desert he met his Lord, and received from him many important spiritual communications. There, too, he meditated on the truths revealed to him, and poured out his heart in prayer for a thorough understanding of their meaning and a full realization of their power. Thus he came back to Damascus, if not with a face glowing like that of Moses when he descended from Sinai, at least with a heart filled and fired with love to Him who had there unfolded to him the mysteries of the Gospel. Now, what Paul thus received from the Lord has been given to us by evangelists and apostles in the New Testament Scriptures. Our Arabia, therefore, will be the study and the closet in which we pore over these precious pages, and seek to comprehend their many sided significance, as well as to imbibe the spirit by which they are pervaded. He who would preach to others must be much alone with his Bible and his Lord; else when he appears before his people, he will send them to sleep with his pointless platitudes, or starve them with his empty conceits. Get you to Arabia, then, ye who would become the instructors of your fellowmen! Get you to the closet and the study! Give your days and nights to the investigation of this book; and let everything you produce from it be made to glow with white heat in the forge of your own heart, and be hammered on the anvil of your own experience!—_W. M. Taylor._ EASY LESSONS IN ANIMAL BIOLOGY. CHAPTER I. Biology is the science of life, the true doctrine concerning all living things. Animal biology is that branch of the science which relates to animals, as distinguished from plants. It tells of these animals what we know about them, where and how they live, what food they eat, how it is received, and how they grow and multiply. Of all the sciences, this seems most extensive, having for its field a world of numberless forms, alike in that they all live, and have some characteristics in common, yet showing great diversity in their structure, appearance, and mode of life. In this summary of facts we shall simply classify, or methodically arrange in groups, according to their distinguishing peculiarities, the members of this vast family.