. Bulletin of the United States Fish Commission. Fisheries -- United States; Fish-culture -- United States. BULLETIN OF THE UNITED STATES FISH COMMISSION. 157 When using 45 lamps we get per indicated horse-power; when using 50, we get per indicated horse-power; and when using 70, we get We have not, to my knowledge, ever used more than 70 lamps at one time, though there are 140 in the plant. The average number of lamps in daily use is about 47,* for which purpose we con- sume about 21 jwunds of coal per hour, and use, on an average, two- thirds of a gill of oil. Since November
. Bulletin of the United States Fish Commission. Fisheries -- United States; Fish-culture -- United States. BULLETIN OF THE UNITED STATES FISH COMMISSION. 157 When using 45 lamps we get per indicated horse-power; when using 50, we get per indicated horse-power; and when using 70, we get We have not, to my knowledge, ever used more than 70 lamps at one time, though there are 140 in the plant. The average number of lamps in daily use is about 47,* for which purpose we con- sume about 21 jwunds of coal per hour, and use, on an average, two- thirds of a gill of oil. Since November we have been using a light oil manufactured by the Vacuum Oil Company of New York, and find that we can run our light machinery with a smaller quantity. As this oil is used on the exhaust fan as well as the dynamo and its engine, it is im- possible to say what proportion each machine receives; but from short experiments I conclude that the dynamo and its engine (when the. Fig. 8. journals are in good order) will use about one-half a gill per hour. Assuming this to be correct, the cost of running the lights for the year has been as follows: The dynamo was in operation 1,592 hours and 45 minutes, during which time the consumption of coal for this purpose was 14 tons 2,082 pounds, at a total cost of $ The oil used during the same period and for the same purpo83 is es- timated to be G7 gallons, the mean cost of which was 72^ cents per gallon, making the total cost for oil $ The cost for repairs, preservation, and restoration has been as fol- lows : 2 K brushes, at $ $5 00 4 Z brushes, at $1 4 00 2 cut-out blocks, at 32 cents 64 *As lamps are so frequently turned on and off in different parts of the ship, at all hours, it would be impossible to keep an accurate Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble
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