The following text may have been generated by Optical Character Recognition, with varying degrees of accuracy. Reader beware!

the combined mass when weighed in the water. Do the same for the heavy mass. Subtract the loss of the heavy body from the loss of the combined mass. Divide the weight of the given body by this difference. QUESTIONS FOR MASTERS AND MATES.--NO\ 64. 822. What is refraction? 823. Define parallax. 824. What do you semi-diameter? 825. What is a logarithm? 826. What.is the log. sine of 30° a7' 47"? 827. What is' the log. cosecant of 125 Oe 828. In latitude 20° 19' the depart- ure made good was 39 miles. What is the difference of longitude by par- allel sa'ling? 829. In lat. 48° 39' the dép. made good was 201.5 miles. What. differ- ence of long. was made? 830. Give the course and distance from a.point in lat. 49°.14' S, 'long. 46°. 46° -W, to a. point in dat.-41> 29' S, long. 40° 49' W. 831. What is the course and dis- Posce trom.lat 337 51'S, tong 15!" my to: lat. 55° 59... S, long. 67712 ave By Mercator sailing. . = understand by QUESTIONS FOR WHEELSMEN AND WATCHMEN. 444. Two steamers start from the same place and sail in opposite direc- tions, one at 18 and the other at 15 miles per hour. apart in 39 hours? 445. Two ships are 7,483: miles apart and are sailing toward each other, one at the rate of 46 and the other at the rate of 53 miles a day. How far are they apart at the end of fs days? | 446. A ship is worth $85,000. A man owns 7/16 of it. of his share, what is the value of the part of his share which is left? 447. A steamer steering east mak- ing 12 miles per hour, meets a steam~-. er steering W making 8 miles per hour; they are 3 miles apart. In how many minutes will they meet? 448. If a steamer runs 49.5 miles in 8 hours, how many miles will she run in 24 hours at the same rate of speed? 449. If your boat runs from Chi- cago to Pt. Betsey, a distance of 203 miles, in 17 hrs. 39 min., how long will at take her at the same rate to run from Pt. Betsey to Waugoshance, a distance of 97 miles? 450. If your boat runs 3% miles in 23 minutes, how fast is she running per hour? How far were: they = If he sells 3/5. "THE Marine REVIEW 451. If a boat steams 2614 miles in 2 hrs. 8 min. 30 sec., how fast is she running per hour and how long does it take her to make a mile? 452. A man owning 0.4725 of a ship sold 0.3 of his share. What part was left to him? 453. The distance round a circle is 3.1416 times the distance across it. If the distance across a circular course is 1,710 feet, what is the dis- tance around it? ANSWERS TO QUESTIONS FOR WHEELSMEN AND WATCHMEN. | 434. Answering a one blast signal with two blasts or a two blast signal with one blast. 435. Never, according to the Rules. See Rule 27 of tthe Pilot Rules. : 436. Four or more short and rapid blasts of the whistle. | 437. Same thing as the danger sig- nal. 438. Four long blasts of the whis- tle, the ensign inverted or any un- usual and continuous noise. Any un- usual display of lights. ; 439. One and two blasts of the whistle. 440. "I am directing my course to starboard." : 441. Two blasts. 442. To starboard. 443. The green light. POWDERED MILK ABOARD SHIP. One of the problems aboard ship is the keeping of milk fresh and sweet. As the demand for it is constant a considerable stock must be put aboard when the ship leaves port, and notwithstanding the care with which it is handled, a fair part of it is frequently spoiled. During the past few weeks, the Ekenberg Milk Products Co., of Portland, N. Y., has endeavored to interest lake vesse'men in powdered milk, and have succeeded to the extent that several companies will use it during the coming season. The cost works out some- what less than fresh milk, while the prod- uct seems to have all of the qualities of fresh milk with the added advantage of being chemically pure and perpetually sweet. For many years scientists have endeav- ored to take the solids from milk leaving them as wholesome, digestible and as nutritious as when in the liquid state. It remained for Dr. Ekenberg, of Sweden, one of the highest authorities on milk products, to discover a perfect and prac- tical method whereby a powder could be produced from milk by a purely mechani- cal process and without the use of any chemical. Judged by the results submitted Trace = the. flour. will continue for several weeks. 31 _to Cleveland vessel owners, he has suc- ceeded in producing powdered milk, keep- Ing in any climate under the same condi- tions as wheat flour, retaining the flavor, nutrition and health-giving properties of the natural milk. It can be restored to liquid form by adding to it the same amount of water as was originally taken from it. To make a glass of sweet, palat- able milk, it is only necessary to put a spoonful of powder in a glass of water. Cream can be produced by lessening the amount of water. In the preparation of doughs for pastries all that is necessary to do is to mix the powdered milk with The product will keep: for months in any climate with reasonable care, The American Museum of Safety Devices and Industrial Hygiene is holding an exposition on the fifth floor of the McGraw building at 231 West Thirty-ninth street, New York. The exposition opened on Monday last and dhe Welin Quadrant Davit have a display of. their full size N. Davit carrying a: dinghey on the. section of a power boat, together with other models of davits, life boats, life rafts, log con- trollers and various other - devices. -Anyone interested in life saving de- vices who may be contemplating a trip to New York in the future would do well to bear this exposition in mind, oe The steamer Wm. H. Wolff, building at the Lorain yard of the American Ship Building Co., for Capt. Dennis Sullivan, . of Chicago, will be launched on 'Saturday next. The steamer Rufus P. Ranney, building at the Superior yard of the American Ship Building Co., for the Tri- ton Steamship Co., managed by J. R.. Davock, of Cleveland, will also be launched next Saturday. The steamer Wm. Livingstone will be launched at the Ecorse yard of the Great Lakes Engineering Works on Saturday; April 25. She is building for the Mutual Steamship Co., of which G. A. Tomlinson, of Duluth, is man. ager. ---------- From the reports of records of small arm target practice received from first and second class vessels of the Uni- ted States Revenue Cutter Service for the six months ended -Dec. 31 last, the following three vessels made the best records: First, the Algonqu'n, at Porto Rico; second, the Tuscarora, at Milwaukee; third, the Forward, at. Key West.