Organization Growth
Eventually the organization grew so much that some sort of society was required. 'So, early in 1881, Zion’s Watch Tower Tract Society was established as an unincorporated body with C. T. Russell as its manager. He and others generously contributed 
some $35,000 to get this printing organization into operation. During 1884 the formerly unincorporated Society was incorporated as Zion’s Watch Tower Tract Society, Russell serving as its president. Today this religious corporation is known as the Watch Tower Bible and Tract Society of Pennsylvania.'
"The purpose for which the corporation is formed," said its charter, "is, the dissemination of Bible truths in various languages by means of the publication of tracts, pamphlets, papers and other religious documents, and by the use of all other lawful means which its Board of Directors, duly constituted, shall deem expedient for the furtherance of the purpose stated."
Russell 'took an approach to explaining Bible teachings that was distinct from many writers of his day. He believed the Bible to be the infallible Word of God and that its teachings should be harmonious. Therefore, if any part of the Bible is difficult to understand, he felt, it should be clarified and interpreted by another part of the inspired Word.'
In 1886 Russell released the first volume of a promised series of books called Millennial Dawn, written by C. T. Russell. Eventually, C. T. Russell wrote five other books of the Millennial Dawn series, but did not survive to write an intended seventh volume. But the 'widespread distribution of the six volumes that he did complete struck a responsive chord in honesthearted persons.'
In 1894 a man was moved to write a letter after he obtained volumes of Millennial Dawn from two women who were colporteurs. 'He read the books, ordered additional copies... subscribed to Zion’s Watch Tower', and wrote: "My dear wife and myself have read these books with the keenest interest, and we consider it a God-send and a great blessing that we have had the opportunity of coming in contact with them. They are indeed a ‘helping hand’ to the study of the Bible. The great truths revealed in the study of this series have simply reversed our earthly aspirations; and realizing to some extent, at least, the great opportunity for doing something for Christ, we intend to take advantage of this opportunity in distributing these books, first, among our nearest relatives and friends, and then among the poor who desire to read them and are unable to purchase." This letter was signed by J. F. Rutherford, who dedicated himself to Jehovah twelve years later and eventually succeeded C. T. Russell as president of the Watch Tower Society.
As a growing number of such truth seekers responded to what they read in publications of the Watch Tower Society, congregations spread through all of the United States and eventually the world.
