The paper informs about a foundation of seismic observatory at Arctowski's Station in the beginning og 1978. Descriptions of the object and of registration seismic instruments are included. Conditions of registration and parameters of instruments are noted. Registration sequence of seismic tremors from March 1978 to October 1979 is described. A preliminary statistics of tremors is also announced.

Istnieją dwa systemy odpowiedzialności za szkody spowodowane olejami: międzynarodowy i Stanów Zjednoczonych Ameryki.

Rząd amerykański w 1989 r. wycofałsięzudziału wsystemie międzynarodowym i przyjął w 1990 r. własną ustawę Oil Pollution Act, która czyni zadość opinii publicznej domagającej się surowych rozwiązań w zakresie bezpieczeństwai odpowiedzialności za szkody olejowe w środowisku morskim. Przyjęta w 1990 r. OPA pozwala stanom USA na własne ustawy przyznające lepszy odfederalnego poziom ochrony poszkodowanym.

Różnic między systemem międzynarodowym isystemem USA jest wiele. OPA ma bardziej kompleksowy zakres stosowania. Dotyczy również odpowiedzialności za szkodyspowodowane wyciekiem z urządzeńorazoleju bunkrowego. Ustawa amerykańska zapewnia pełniejszą kompensację poszkodowanych ze względu na szersze pojęcie szkody spowodowanej zanieczyszczeniem. OPA w większym stopniu czyni zadość zasadzie „płaci zanieczyszczający”.

Stany Zjednoczone Ameryki krytykują w systemie międzynarodowym zbyt niskie granice odpowiedzialności oraz nieujęcie szkody ekologicznej.

This investigation is concerned with the extraction of nugget copper particles from copper recovery plant slag which recycled of copper scrap. For this purpose, the Falcon concentrator was used because of its enhanced gravity properties. The Falcon concentrator has a fast spinning bowl which creates a centrifugal force to separate fine size minerals on the basis of their density differences. In the tests, the tailings of the copper recovery plant were used and the test sample was divided into two groups and one of them was classified in narrow particle sizes. The operational parameters were determined as particle size, centrifugal force and washing water pressures. The water pressure and centrifugal force have an inversely proportional relationship. Because of this phenomenon, the G/P parameter was created. The test conditions were applied to the whole distribution sample and narrow size distribution samples in the same way.

The test results indicate that the average grade was elevated from 1.04% to 6.50% with the recovery of 15.07% and 619% enrichment ratio for narrow sizes, whereas grade was elevated to 4.36% with 13.24% recovery and 415.94% enrichment ratio for the whole distribution. As a result, the recovery and grade values of concentrates are not good enough for gravity concentration process for both samples. However, this process was applied to the double recycled material and the lower recovery, grade values can be tolerated because of concentrate is nugget copper metal. The concentrate can also be washed in cleaning table for increasing the grade value for adding to initial feed of plant. This process can, therefore, supply important earnings not only economically but also environmentally.

Transient heat transfer is studied and compared in two plane-parallel composite walls and one EPIDIAN 53 epoxy resin wall acting as a matrix for both composites. The first of the two walls is made of carbon-epoxy composite; the other wall is made of glass-epoxy composite, both with comparable thickness of about 1 mm and the same number of carbon and glass fabric layers (four layers). The study was conducted for temperatures in the range of 20-120 °C. The results of the study of thermal diffusivity which characterizes the material as a heat conductor under transient conditions have a preliminary character. Three series of tests were conducted for each wall. Each series took about 24 h. The results from the three series were approximated using linear functions and were found between (0.7-1.35) x 10-7m2/s. In the whole range of temperature variation, the thermal diffusivity values for carbon-epoxy composite are from 1.2 to 1.5 times higher than those for the other two materials with nearly the same thermal diffusivity characteristics.