This guide is designed to provide a simple means of identifying the main groups of protoza found in aquacultre ponds through photographs and drawings. This is supplemented with information on the likely effects of protoza on water quality and the health of the cultured species.

Digital Calculations of Engine Cycles is a collection of seven papers which were presented before technical meetings of the Society of Automotive Engineers during 1962 and 1963. The papers cover the spectrum of the subject of engine cycle events, ranging from an examination of composition and properties of the working fluid to simulation of the pressure-time events in the combustion chamber. The volume has been organized to present the material in a logical sequence. The first two chapters are concerned with the equilibrium states of the working fluid. These include the concentrations of various species of any significance that may appear at equilibrium in the combustion products, as well as the pressures and temperatures to be expected. This is followed by separate chapters on Mollier diagrams of the combustion products and the Otto cycle. The last two chapters focus on the synthesis of the spark ignition engine cycle from basic information on thermodynamics, heat transfer, and combustion. The results of the synthesis of these cycles are then compared to the actual cycle produced by an engine.

The primary purpose of this extensive test effort was to observe real-time operational performance characteristics associated with automotive grade fuel utilized by piston engine powered light general aviation aircraft. In fulfillment of this effort, baseline engine operations were established with 100LL aviation grade fuel followed by four blends of automotive grade fuel. A comprehensive - sea - level - static test cell/flight test data collection and evaluation effort was conducted to review operational characteristics of a carburated light aircraft piston engine as related to fuel volatility, fuel temperature, and fuel system pressure. Sea - level - static test cell engines operations were conducted utilizing an AVCO Lycoming 0-320 engine connected to an eddy current dynamometer which facilitated data collection under various engine load conditions. In addition, real-time inflight performance data was obtained utilizing a Cessna 150/Continental 0-200A engine, while operating on test fuels No. 1 and No. 2 which had Reid vapor pressures of 14.4 psi and 8.0 psi, respectively. Originator furnished key words include: General Aviation, Automotive Fuel, Aviation Fuel, Vapor lock, Vapor-Liquid Ratio, Fuel Additives, Light Aircraft, Piston Engines, and Fuel Volatility.