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-_ that the annealed zones should overlap each other. As described above, it is very important that the tem- perature of any individual part should be gradually and slowly withdrawn; and while for individual spots the only possible way to do this was by gradually dim- * eB FIG. 7. inishing the current, it was obvious that when a line was to be annealed, instead of annealing a number of spots side by side, the same effect of withdrawing the heat gradually from one portion could be obtained by moving the apparatus itself relatively to the plate to be treated. It was found that aspeed of about \’’ per . minute was sufficiently slow to ensure thorough an- nealing. The copper contacts were of the simplest kin¢, as de- scribed above, bedding themselves partially in the surface, and when being dragged along by the screw and uut, raised in front of them- selves a burr or chip similar to a planing tool. After a whole day’s continuous use the copper contacts were found in tact, while a number of chips from the steel surface were lying about. We thus had the peculiar phenomenon of a hard steel chip cut with a copper tool. Upon the completion of the work, it was found that a strip about 24%’’ wide throughout the length over which the machine had been moved, could be operated upon by drills or a shaper, in a manner as easily as if it had never been hardened before. Fig. 7 gives a view of a sample plate an- nealed by the method described above, and cut out to representa port-hole as is used on the turrets of a man-of-war. It is necessary to state that when the appar- atus is used for continuous annealing, the pri- mary current is kept at a nearly constant value, | the diminishing of heat at any individual spot being obtained solely by the moving of the ap- paratus from it. As mentioned before, the places where the contacts are passing overthe plate, being brought to a higher temperature than oany other, remain hard. Experience has demon. strated, however, that they may be re-an- nealed later on, by treating the spots in the Same way as any other hard spot on the plate. By this means we are therefore able to anneal any shaped portions, not merely lines. ° The apparatus may also be used for the re- versal of the annealing process; that is to say for creating isolated hard spots in soft tool steel by sending a current through the spot to be hardened uutil it reaches a bright cherry heat, and then suddenly removing the current or machine, Various other applications will suggest themselves in the operation of this process, already adopted by the United States government. It may be used in the con- struction of burglar-proof safes, for dies and punches, for projectiles and other articles of a similar nature. EDP ee Oe THE MARINE RECOBD is the repository for all en- gineering and nautical publications. Hydrographic charts always on hand. ‘ THE MARINE RECORD. = we ne VISIBLE SUPPLY OF GRAIN. As compiled for THE MARINE RECORD by George F. Stone, Secretary Chicago Board of Trade, January 4, 1896. 2) Ww vy WHEAT, CORN. OATS, RYE, |. BaRLHY ee Gots ee Bushels. | Bushels. | Bushels, | Bushels, Bushels, | Alban yess ata eee | ©*. 90,000] 215 000). ...0..0.. | © 70-000 Baltimore ............ | 801,000} 1.843000} 158.000! 118000).......... Boston .......:. | 1,845.090} 282 000). «13. 000].......... beaten Buffalo,...... | 2'987,000| 113,000/ 81,000" 441.000) 1.955.060 “afloat 259, 0001. «sms gcras | 423,000) 304,000 Chicago,.... 21 094.000) 1.525000) 554 000) 24 000 att pa HORE ss. sav cniewivewse MUO, 000 |e 21 2272000 | ccssciw cele ahaa ss coats Cincinnati,..... . 44,000 5 000 32,000} 36.000} 135 000 Detroit. eee kt cces | 357.000) 19 000 13,000] 14,000] 5,000 egatlodtrr ss a. Pet rete eoeaee Sie eae Fae ae Sah canes Duluth and Superior,.| 8 877.000) 22,000), 665000) 154000 147,000 . fe afloat! <= 619 N00, ete eee lees eee ele ci Indianapolis,,..........| _ 101 000 28 000 Sel oe Ssae nol eee seeds , Kansas City,......... 1 539 000 5 000 (2,000 E82 20-000)2; arc cos Milwaukee, .......... 440 000) ..........] 2,000) 179,000] 39,000 ves! afloat .... UT So cecais'e dele | L20,000] 6 oe io ase rience scier Minneapolis, ... 18 842 000 78.000} 578,000] 156.000) 190,000 Mcntreal. .... in 252 000} 6,000! 199900) ~ 3000 38,900 New York... | 7906 000) 1,176 000] 1681000; 23,000] 288 W00 fcc alloats ees 976 000} 42,000| 314,000)..........} 355,000 QTE ARS aa 14.000] 24 000],......... | 146.000 12d 0) oer adh 61000} 225.000} 282 090)... see cl cce eee eee Philadelphia ......... 566:000| © 217 000)" 172 000)... 5.20... )ecceenee es St. Louis,... ... ....| 1,420 .000 55.000) 576 000 11,000) 12,000 Si MANOAL sre siaiel ects a ee E Gee Ce nElc Maine cue Mee ere ime gegicie s Toledo. .Gs Gtess. : 867,000] 202000) 176,000) 123000) ......... ailoabin Soa ees Wine acray at eke ee hake a vwac ae eaalt me soe I eatated ea does Toronto ...... 39,000) 0.0.5.5 6 58,000]... 2... | 28,000 OniCanall Hicwercee unites vuaeeas 8.000 ADMIN erro calerers Gert On Lakes, cescc vena Pe cpuiats oe crahedtove Surerecats Sal Sarat pte ote a |Site ob Seals On Mississippi. ....... | 21,000 16,000 BeOOOW HAE Sis dais Grand Total. ......... €8 945.000] 6 181,000} 6 369,000] 1,532 000| 3,731,000 Corresponding date 1894..............| 86,615,000} 11 084 000) 8,663 000] 475 000) 2.624.000 NEW GOVERNMENT LIFEBOAT. The first of 12 lifeboats the government ordered ar- rived recently in New York from Port Huron, Mich., where they are being built by the Wolverine Dry-Dock Co. It is 34 feet long and 8 feet beam, fitted for oars or sails. It is called the Sandy Hook, and will be sta- tioned at Sandy Hook under Skipper ‘Trexonian Patter- son’s control. Six of the new boats are for the Atlantic and six for the Pacific coast and the Great Lakes. The WORKING ON A BIG PLATE. new boat is self-bailing and she cannot upset. Capt. Thomas D. Walker, inspector in the life-saving serv- ice, is enthusiastic over her. ‘‘Fill her with water,”’ he says, ‘‘and she bails herself out in 15 seconds. She can- not be kept in any position but right side up. Fifty persons can be saved in her atatime. She has a deck, and the space below is divided into airtight compart- ments. There are air tanks fore and aft reaching above the deck. She will not sink until four-fifths of the air tanks are burst.”’ NEW INVENTIONS. (ILLUSTRATED), The following patents of interest to the marine and relative industries have been issued within a week: No. 552,618. Boat. Robert S. Peabody, Philadelphia, Pa.. Filed May 1, 1895, The claim is for a vessel provided with convergent longitudinally convex grooves a’, extending from the opposite sides of its prow, and merging with its bottom aft of midships, and extending in the middle of the hull toits stern and having a propeller at the exit of said stern groove and propellers disposed at the entrances of said convergent grooves and rotated in opposite direc- tions in such manner that their lowest portions move inward. SESS SSS SSS SSS 7, y G SSS 4, f 1 "7 Y SSS SSS i! x = = SR No. 552,613. Marine Propulsion. Chicago, Ill. Filed Feb. 28, 1895. The claim is for marine propellers, a paddle-box pivoted to the stern of a vessel and having two compartments separated by an intermedi- ate space, in combination with a shaft carrying the disks KE - and spur- wheel. M; two shafts carry- ing the disks H 4H; cranks G connecting « said disks K— H and provid- ed with wrists -; pivoted to paddles;anda 3 shaft carry-7 ing a_spur- ‘ wheel L, to mesh with the spur-wheel M the said wheels L, M being between the com- partments K K, No. 552,536. Air and Light Port for Marine Vessels. William K. MacKenzie and Charles Chamberlain, Washington, D.C. The claim is for the combination of a frame or parthaving a light or ventilating opening, a stopper or closure for the latter composed of a two-part frame, with light lens, and means connecting the stopper or closure and the frame whereby the former can be both rotated and Swung upon its bearings, and a locking device for such stopper or closure. SSS SAGINAW M. E. B. A. M. KE. B. A., No. 92, of Saginaw, E. S., Mich., has elected the following officers for the ensu- ing year: Past president, Jacob Oscar; presi- dent, Charles Morgan; vice-president, Joseph D. Budd; chaplain, John Wychoff; treasurer, John Henry; financial secretary, Walter Henry; corre- sponding secretary, Harry E. McArthur; recording secretary, Frank Nold; conductor, Joseph R. Hall; doorkeeper, Fred Pflenger; trustees, J. D. Budd, A.M. Barber and M. W. Gaffing. John Henry was chosen as the representative to the national convention, to be held at Washington, D.C. The address of the corresponding secretary is 17 McCormick Building, Saginaw. Andrew Holin,