But astronomy is a very enervating branch of science. Galileo frequently came down to breakfast with red, heavy eyes; eyes that were swollen full of unshed tears. Still he persevered. Day after day he worked and toiled. Year after year he went on with his task till he had worked out in his own mind the satellites of Jupiter and placed a small tin tag on each one, so that he would know it readily when he saw it again. Then he began to look up Saturn's rings and investigate the freckles on the sun. He did not stop at trifles, but went bravely on till everybody came for miles to look at him and get him to write something funny in their albums. It was not an unusual thing for Galileo to get up in the morning, after a wearisome night with a fretful new-born star, to find his front yard full of autograph albums. Some of them were little red albums with floral decorations on them, while others were the large plush and alligator albums of the affluent. Some were new and had the price-mark still on them, while others were old, foundered albums, with a droop in the back and little flecks of egg and gravy on the title-page. All came with a request for Galileo "to write a little, witty, characteristic sentiment in them." Galileo was the author of the hydrostatic paradox and other sketches. He was a great reader and a fluent penman. One time he was absent from home, lecturing in Venice for the benefit of the United Aggregation of Mutual Admirers, and did not return for two weeks, so that when he got back he found the front room full of autograph albums. It is said that he here demonstrated his great fluency and readiness as a thinker and writer. He waded through the entire lot in two days with only two men from West Pisa to assist him. Galileo came out of it fresh and youthful, and the following night he was closeted all night with another inventor, a wicker-covered microscope, and a bologna sausage. The investigations were carried on for two weeks, after which Galileo went out to the inebriate asylum and discovered some new styles of reptiles. Galileo was the author of a little work called "I Discarsi e Dimas-Trazioni Matematiche Intorus a Due Muove Scienze." It was a neat little book, of about the medium height, and sold well on the trains, for the Pisan newsboys on the cars were very affable, as they are now, and when they came and leaned an armful of these books on a passenger's leg and poured a long tale into his ear about the wonderful beauty of the work and then pulled in the name of the book from the rear of the last car, where it had been hanging on behind, the passenger would most always buy it and enough of the name to wrap it up in.