Polish Society of Nephrology improvements in continuous professional development as well as research activities among young doctors and other professionals in the fields of nephrology, dialysis therapy and renal transplantation. PSN Congresses are organized every three years. As yet twelve Congresses were held in the following locations in Poland: 1st Congress - Bydgoszcz (1983) 2nd Congress - Kraków (1986) 3rd Congress - Gdańsk (1989) 4th Congress - Katowice (1992) 5th Congress - Lublin (1995) 6th Congress - Poznań (1998) 7th Congress - Kraków (2001) 8th Congress - Białystok (2004) 9th Congress – Katowice/Wisła (2007) 10th Congress - Bydgoszcz (2010) 11th Congress - Wrocław (2013)
Johnson Organs and beautiful voicing". Highest quality materials and workmanship were used, and Johnson's organ pipes were always of the finest quality. Tracker organs eventually became less popular, and, not wishing to switch to tubular-pneumatic- or electro-pneumatic-action organs, the company ceased operations in 1898. Their last organ was a large 3-manual organ, Opus 860, at St. Paul's Church in Chicago. All information in this article comes from this book: Johnson Organs The William A. Johnson Organ Company of Westfield, Massachusetts, which later became Johnson & Son Organ Company, was a highly respected firm that built 860 pipe organs throughout the United States