A LESSON IN LECTURING

“I have lectured a great many times since then, but my first lecture was the most trying. I am now glad that things happened as they did, for that experience taught me a valuable lesson. I learned not to commit my talks to memory, but merely to have the topics and facts and general arrangement of the lecture well in mind. By this method, I can change and adapt myself to my audience at any time; and I often have to do this. I am able to feel intuitively whether I have gained my listeners’ sympathy and interest, and when I feel that I have not, I immediately take another tack. Another great advantage of not committing what you are going to say to memory, word for word, is the added color and animation and spontaneity which the conversational tone and manner gives the lecture.”

THE STEREOPTICON

“My stereopticon pictures of the heavenly bodies are of great help to me. They naturally add much to the interest, and are really a revelation to most of my audiences, for the reason that they show things that can never be seen with the naked eye. How my father would have delighted in them, and how effectively he would have used them. But celestial photography had not been made practical at the time of his death; it is, indeed, quite a new art, although its general principles are very simple. A special lens and photographic plate are adjusted in the telescope, and the plate is exposed as in an ordinary camera, except that the exposure is much longer. It usually continues for about four hours, the greater the length of time the greater being the number of stars that will be seen in the photograph. After the developing, these stars appear as mere specks on the plate. That they are so small is not surprising, for most of them are stars that are never seen by the eye alone. When the photograph is enlarged by the stereopticon, the result is like looking at a considerable portion of the heavens through a powerful telescope.

“The children utter exclamations of delight when they see the pictures,—the children, dear, imaginative little souls, it is my ambition to devote more and more of my time to them, and finally talk and write for them altogether. They are greatly impressed with the new world in the skies which is opened to them, and I like to think that these early impressions will give them an understanding and appreciation of the wonders of astronomy that will always be a pleasure to them.”

“STORIES FROM STAR LAND”

“For the children, my first book, ‘Stories From Starland,’ was written. I tried to weave into it poetical and romantic ideas, that appeal to the imaginative mind of the child, and quicken the interest without any sacrifice of accuracy in the facts with which I deal. I wrote the book in a week. The publisher came to me one Saturday, and told me that he would like a children’s book on astronomy. I devoted all my days to it till the following Saturday night, and on Monday morning took the completed manuscript to the publishing house. They seemed very much surprised that it should be finished so soon; but as a matter of fact it was not much more than the manual labor of writing out the manuscript that I did in that week. The little book itself is the result of ten years’ thought and study.

“It is much the same with my lectures. I deliver them in a hasty, conversational tone, and they seem, as one of my listeners told me recently, to be ‘just offhand chats.’ But in reality I devote a great deal of labor to them, and am constantly adding new facts and new ideas.”

CONCENTRATION OF ATTENTION

“I learned very soon after I began my work, that I must give myself up to it absolutely if I were to achieve success. There could be no side issues, nothing else to absorb any of my energy, or take any of my thought or time. One of the first things I did was to take a thorough course in singing, for the purpose of acquiring complete control of my voice. I put aside all social functions, of which I am rather fond and have since devoted my days and nights to astronomy,—not that I work at night, except when I lecture; I rest and retire early, so that in the morning I may have the spirit and enthusiasm necessary to do good work.