this progress. The country all the way westward to the Susquehanna was easy hill, dale, and valley, covered by a magnificent growth of large forest trees—oaks, beeches, poplars, walnuts, hickories, and ash—which rewarded the labor of felling by exposing to cultivation a most fruitful soil.

The settlers followed the old Indian trails. The first westward pioneers seem to have been the Welsh Quakers, who pushed due west from Philadelphia and marked out the course of the famous Lancaster Road, afterwards the Lancaster Turnpike. It took the line of least resistance along the old trail, following ridges until it reached the Susquehanna at a spot where an Indian trader, named Harris, established himself and founded a post which subsequently became Harrisburg, the capital of the State.

For a hundred years the Lancaster Road was the great highway westward, at first to the mountains, then to the Ohio, and finally to the Mississippi Valley and the Great West. Immigrants and pioneers from all the New England and Middle States flocked out that way to the land of promise in wagons, or horseback, or trudging along on foot. Substantial taverns grew up along the route; and habitual freighters and stage drivers, proud of their fine teams of horses, grew into characters of the road. When the Pennsylvania Railroad was built, it followed the same line. In fact, most of the lines of railroad in the State follow Indian trails. The trails for trade and tribal intercourse led east and west. The warrior trails usually led north and south, for that had long been the line of strategy and conquest of the tribes. The northern tribes, or Six Nations, established in the lake region of New York near the headwaters of the Delaware, the Susquehanna, and the Ohio, had the advantage of these river valleys for descending into the whole Atlantic seaboard and the valley of the Mississippi. They had in consequence conquered all the tribes south of them as far even as the Carolinas and Georgia. All their trails of conquest led across Pennsylvania.

The Germans in their expansion at first seem to have followed up the Schuylkill Valley and its tributaries, and they hold this region to the present day. Gradually they crossed the watershed to the Susquehanna and broke into the region of the famous limestone soil in Lancaster County, a veritable farmer's paradise from which nothing will ever drive them. Many Quaker farmers penetrated north and northeast from Philadelphia into Bucks County, a fine rolling and hilly wheat and corn region, where their descendants are still found and whence not a few well-known Philadelphia families have come.

The Quaker government of Pennsylvania in almost a century of its existence largely fulfilled its ideals. It did not succeed in governing without war; but the war was not its fault. It did succeed in governing without oaths. An affirmation instead of an oath became the law of Pennsylvania for all who chose an affirmation; and this law was soon adopted by most American communities. It succeeded in establishing religious liberty in Pennsylvania in the fullest sense of the word. It brought Christianity nearer to its original simplicity and made it less superstitious and cruel.

The Quakers had always maintained that it was a mistake to suppose that their ideas would interfere with material prosperity and happiness; and they certainly proved their contention in Pennsylvania. To Quaker liberalism was due not merely the material prosperity, but prison reform and the notable public charities of Pennsylvania; in both of which activities, as in the abolition of slavery, the Quakers were leaders. Original research in science also flourished in a marked degree in colonial Pennsylvania. No one in those days knew the nature of thunder and lightning, and the old explanation that they were the voice of an angry God was for many a sufficient explanation. Franklin, by a long series of experiments in the free Quaker colony, finally proved in 1752 that lightning was electricity, that is to say, a manifestation of the same force that is produced when glass is rubbed with buckskin. He invented the lightning rod, discovered the phenomenon of positive and negative electricity, explained the action of the Leyden jar, and was the first American writer on the modern science of political economy. This energetic citizen of Pennsylvania spent a large part of his life in research; he studied the Gulf Stream, storms and their causes, waterspouts, whirlwinds; and he established the fact that the northeast storms of the Atlantic coast usually move against the wind.

But Franklin was not the only scientist in the colony. Besides his three friends, Kinnersley, Hopkinson, and Syng, who worked with him and helped him in his discoveries, there were David Rittenhouse, the astronomer, John Bartram, the botanist, and a host of others. Rittenhouse excelled in every undertaking which required the practical application of astronomy, He attracted attention even in Europe for his orrery which indicated the movements of the stars and which was an advance on all previous instruments of the kind. When astronomers in Europe were seeking to have the transit of Venus of 1769 observed in different parts of the world, Pennsylvania alone of the American colonies seems to have had the man and the apparatus necessary for the work. Rittenhouse conducted the observations at three points and won a world-wide reputation by the accuracy and skill of his observations. The whole community was interested in this scientific undertaking; the Legislature and public institutions raised the necessary funds; and the American Philosophical Society, the only organization of its kind in the colonies, had charge of the preparations.

The American Philosophical Society had been started in Philadelphia in 1743. It was the first scientific society to be founded in America, and throughout the colonial period it was the only society of its kind in the country. Its membership included not only prominent men throughout America, such as Thomas Jefferson, who were interested in scientific inquiry, but also representatives of foreign nations. With its library of rare and valuable collections and its annual publication of essays on almost every branch of science, the society still continues its useful scientific work.

John Bartram, who was the first botanist to describe the plants of the New World and who explored the whole country from the Great Lakes to Florida, was a Pennsylvania Quaker of colonial times, farmer born and bred. Thomas Godfrey, also a colonial Pennsylvanian, was rewarded by the Royal Society of England for an improvement which he made in the quadrant. Peter Collinson of England, a famous naturalist and antiquarian of early times, was a Quaker. In modern times John Dalton, the discoverer of the atomic theory of colorblindness, was born of Quaker parents, and Edward Cope, of a well-known Philadelphia Quaker family, became one of the most eminent naturalists and paleontologists of the nineteenth century, and unaided discovered over a third of the three thousand extinct species of vertebrates recognized by men of science. In the field of education, Lindley Murray, the grammarian of a hundred years ago, was a Quaker. Ezra Cornell, a Quaker, founded the great university in New York which bears his name; and Johns Hopkins, also a Quaker, founded the university of that name in Baltimore.

Pennsylvania deserves the credit of turning these early scientific pursuits to popular uses. The first American professorship of botany and natural history was established in Philadelphia College, now the University of Pennsylvania. The first American book on a medical subject was written in Philadelphia by Thomas Cadwalader in 1740; the first American hospital was established there in 1751; and the first systematic instruction in medicine. Since then Philadelphia has produced a long line of physicians and surgeons of national and European reputation. For half a century after the Revolution the city was the center of medical education for the country and it still retains a