1) Being designed by a talented scientific worker the device was a success. 2) Confining his attention to one problem the scientist will surely achieve its solution much sooner. 3) Having solved that equation the mathematician found the ratio between the numbers. 4) Comparing these preliminary estimates we arrive at the following conclusion. 5) Having been given all the instructions the engineer started his work at once taking into account all the points of the received instruction. 6) Recognizing a problem the scientist makes the first step to its solution. 7) Being too expensive the project could not be approved. 8) If completed the experiments will make it possible to draw definite conclusions. 9) When applied the method increases the efficiency of the process. 10) If realized the problem becomes something man can cope with. 11) Having made a great number of experiments with different substances the chemist found out that most of them could be decomposed into other substances. 12) Having been tested the new apparatus was recommended for research in all the laboratories. 13) If properly treated these raw materials can provide us with all necessary substances. 14) While explaining the results of the experiment the professor wrote many formulae on the blackboard. 15) Increasing the amount of available technical information scientists also contribute to transformation of some well-rooted beliefs.