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60 "AROUND THE LAKES. aid and opportunities furnished by the officers and engineers were all that could be desired. The bill of lading called for 3,04G gross tons of cargo, but 1 per cent, had been deducted from the actual weight for moisture, making the actual weight 3,078.8 gross tons or 3,448 # net tons. Also, had the ship not been sheathed with wood, the weight of the wood, 150 net tons, might be added to the cargo without increasing the displacement of the ship, and making the cost per ton cargo per mile, 4 per cent. less. Four sets of indicator cards, Nos. 14, 17, 19 and 26, taken during tests Nos. 3, 4, 5 and 6 respectively, have been expanded, all to the same scale of volume and pressure, and coincident with the expansion curve of the H. P. diagram, an isothermal curve has been drawn. To the mean effective pressure of all the cards has been applied the correction for the springs, and gage readings are also corrected. The main engine was in excellent condition as regards the absence oi leakage of any kind, and was very quiet in operation. The main boilers were clean internally and showed no leakage. The mean result of the data taken from the calorimeter during each test made, in each case : 1.8 per cent, moisture in the steam. I have not, in this brief report, attempted to develop all the facts that the data obtained present, but only the important ones. Among the interesting features to be solved are those relating to the uniformity of crank effort and the operative cost of the auxiliaries. I have drawn no conclusions as to the efficiency of the different parts taken separately or as a whole, and have left the suggestions for improvement, such as might be derived from close analysis of the results, to yourselves.