During the past several years big changes have been observed in waste water disposal, noticeable particularly in the improvement of water protection and sewage treatment. An important element of waste water disposal still requiring improvement is a low development of sewage systems in rural and urban areas. The main problem is an increasing amount of sludge, high degree of sediment hydration and considerable ability to anaerobic decomposition, a lack of areas for managing sediments near big cities and deposits of sediments on storage areas. Selected issues of waste water disposal and sludge handling in the Mazovian Province against a background of waste water disposal and sludge handling in Poland were presented in the article.

In the paper, the Author presents the method of realisation of various scenarios of "test ride" on engine test bench. Research possibilities offered by semi-virtual system consisting of a real engine and a vehicle simulator are described. The previous article by the Author, "The Principles of Engine Operation Simulation in Test-bench Examination in the Conditions Equivalent to Traffic Exploitation of the Vehicle" [7] was devoted to the description of test requirements. Test accuracy, structure and equipment of the test stand were described there, as well as the characteristics of the software that controls the test and monitors its correctness.

The article presents and contextualizes heretofore unpublished letters of Thaddaeus Zieliński to the classical philologist Mieczysław Popławski, preserved in the Library of the Catholic University of Lublin.

This paper discusses the study of the atmosphere of architecture, which places human perception of space at the centre, and thus expands the humanist aspect of architectural and urban theory and design. Referring her own research to the current state of the art, the author presents various definitions of atmosphere and methodologies of its description, which considerably encroach into the field of neurophysiology and psychology, but also value contemplation, literary descriptions, photographs and stage design in a new light.