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34 QUESTIONS FOR MASTERS AND MATES. NO. 26. 385. What is the standard compass used for? : 386. How should it "be enunted? 387. What kind of iron would you avoid particularly in placing this com- pass? 388. What kind of magnetism in the end of vertical iron farthest from the earth in north magnetic latitude? 389. What effect will this kind of magnetism have on the north end of the compass needle? 390. For what other reason is she standard compass mounted above the rail, other than to diminish the mag- netic force within the ship? ~ 301. -On a steam .vessel what are 'the different pieces of equipage made of vertical iron, or comprise vertical iron? 392.. In adjusting a compass is the 'variation adjusted in with the devia- tion? 393. Will the magnetic influence be stopped by placing anything between the compass and the iron and steel that disturbs it?. 304. Will brass, copper, or lead ef- fect the compass? Why? 3905. Will magnetism go through brass or copper? 396. Will magnetism pass through wood? 307. Has .any effective screen ever been produced? -398. How do you determine a true magnetic course or bearing from that given by compass? 399. What is sub-permanent magne- tism? le QUESTIONS FOR WHEELSMEN AND WATCHMEN.--No. 27. 271. Give true course and distance from a point 2 miles N. of White Fish Pt. lighthouse to a point 3 miles N. of Huron island lighthouse? 272, Give correct magnetic course and distance from a point 3 miles N. of Huron island lighthouse to a point I mile south of Portage entry. 273. Give true course and distance from Marquette breakwater light to a point 4 miles N. of Copper Harbor lighthouse passing between Kewee- naw point and Manitou Island. 274. Give true course and distance from Marquette breakwater light to a point 1 mile S. of Portage entry. 275. Give correct magnetic course and distance from a point 2 miles N. of White Fish point lighthouse to a point 1 mile SW' x S%S from Passage island lighthouse. 276, Give corfect magnetic course and distance from a point 1 mile SW THE Marine REVIEW x S1%4S from Passage island lighthouse to entrance Fort William Harbor. Give true course and distance 277; . from 2 point 3 miles S. of Thandér Cape lighthouse to a point 1 mile N. W. from La Pointe lighthouse. 278. Give true course and distance from a point 3 miles S. of Thunder Cape lighthouse to the entrance of Duluth Harbor. 279. Coming from the eastward and wishing to anchor under Grand Island how would you successfully pilot your boat to Williams' Landing Anchorage? '280. Coming from the northward and entering on the east side of Grand Island, explain how you would pilot your boat so-as to bring her safely into South Bay? 281. Wishing to come to an anchor- age at Williams' Landing explain how you would do so entering from west side of Grand Island? QUESTIONS FOR OILERS AND WATERTENDERS.--NO. 22. 210. Supposing you wanted to lay up a forward sea cock during freez- ing weather how would you do same; steamer to remain in commission? 211. An engine having 42 in. stroke the slide valve has 9 in. travel, the lap of same 3 in. of the steam parts with a lead of % in., at what distance from the end of the stroke will -the steam be cut off at? 212. What would be the horsepower of an engine the cylinder of which is 50 in., stroke 4o in., revolutions 68, the raean effective pressure 35 lbs.?. 213. In replacing a broken shaft could one be made stronger yet of slight difference in weight? If so, how? 214. Name a few important ways or devices of saving fuel in connection with the modern marine engine? 215. Why are jet condensers more in use on the lakes than circulating? 216, In running free during a heavy sea what precaution would you take to prevent damage to engine? 217. What precaution do you take before starting up an engine? 218. Do some engines require more than others? 219. Should one of the air pump valves give out which one would be least noticeable? 220,. Explain what is meant by the term lbs. of vacuum? Capt. Ed. Sullivan, of the Hanna fleet, is planning on pulling up stakes at his native home, Trenton, Mich. and moving to Cleveland with Mrs. Sullivan. Capt. Ed. was married to a Trenton belle at Erie during the summer. McARTHUR'S PORTABLE FIRE ESCAPE. The McArthur portable fire escape or Jacob's ladder, which is now being introduced on the lakes, is meeting with much success. Capt. Hugh Mc-. Alpine, master of the steamer Erie, has written as follows: "We have tried and tested a sam- ple of the. McArthur Portable Fire -- Escape and Jacob's ladder and consider it one of the best of its kind we have ever seen for any boat or building which have straight up and down sides to which the ladder can be applied." The Upson-Walton Co. has written the following endorsement of it. "We have in our store a sample of the McArthur patent portable metal- lic fire escape or Jacob's ladder. It is light and strong, non-combustible non-corrosive, and just the thing for passenger boats, steam freighters or other vessels, also for manufacturers, hotels, apartment houses, etc. All ought to be equipped with this most useful appliance." TRADE NOTES. The Independent Pneumatic Tool Co., has purchased a large four-story brick building adjoining its plant at . Aurora Ill., giving it ~ approximately 100,000 sq. ft. of additional floor space. About $65,000 will be spent in new ma- chinery. The Atlantic Works Incorporated, 28th street, and Gray's Ferry Road, Philadelphia, recently received an or- der from the National Wrecking Co., Milton, Del., for one of their B-17 ad- justable bevel band saw machines which are built specially for boat yard wotk.. The Illinois Boiler Cleaning Com- pound Co., 280 Hudson avenue, Chi- 'cago, has just put out a little catalog descriptive of their compound for cleaning and preserving steam boilers. They represent that their compound prevents the formation of scale, pit- ting and corrosion in steam _ boilers. The compound. is purely vegetable and is put up in powdered form. The Falls Hollow. Staybolt -Co,, Cuyahoga Falls, O., report that their business during 1906 was' 50 per cent greater than any previous year's show- ing. The company attributes this great success to the fact that mechani- cal men are more and. more realizing the advantages and economy in stay- ing their modern high-pressure loco- "motive and marine boilers with Falls Hollow staybolt iron. G. E. Phillips has been appointed as- sistant traffic manager of the White Star Line of Detroit.