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SCLENTIFIC AND INDUSTRIAL, All mushrooms, Dr. G. Dupetti finds, cor- tin a poisonous substance when uncooked. Bars of steel obtained by the cementation process in the works at Unieux frequently contain crystals in those portions exposed to the hottest portion of the furnace. According to Maciejewsky it pays better to manufacture overgrown wheat into spirits than into bread. ‘he best results are ob- tained from unbruised wheat. Prot. Vogler considers that a part of the duty of observers at meteorological stations should pe to ascertain the quantity of oxy- gen in the air from time to time, as he be- lieves that the per centage of it varies or is intimately connected -with barometric changes. Myopia, with all its attendant annoyances, is increasing in the public schools both here and abroad, Intensity ot application to work under the stimulus of competition is one of the principal causes of short-sight- “edness among children. AImperfectly light- ed schoolrooms is another, Tn curious contrast with prevalent notions about the Arctic regions are the statistics of trade between the four ports of Nerwegian Finmark and the Russian ports of the White sen, especially Archangel. In 1841 470 ves- sels, employing over 2,000 men, visited the Finmark porte, and in 1882 a‘still larger number, bringing goads, chiefly the pro- ducts ‘of the rich fisneries of the White sea, to the amount of more than $700,000, and re- ceiving eargoer for Russia -of nearly equal value. The velocity of the wind within the vor- tex of a tornado is, according to a report of the United States signal service, variously estimated at from 70 to 800 miles an hour, the average being 392 miles. It would be interesting to know in .what way these ve- locities were estimated, An average of 392 miles certainly indicates supposed accuracy, but they were not measured, and a velocity of 800 miles an hour, corresponding on the lowest basis of calculation to a pressure of 1,500 pounds to the square toot, seems almost incredible. ‘There is, however, no reason to doubt, that over a very limited area the ve- locity and preseure of the wind in these tor- nadoes or whirlwinds are very much greater than any that-have been accurately meas- ured. The shipbuilding trade ow the Clyde con- tinues brisk, although not so many vessels are on the stocks as formerly. Recent sta- tistics show that for the month of May 31 vessels of 35,435 tons were launched, being an increase of 3,104 tons over the corre- sponding month last year, but 279 tons un- der that of May, 1881. In the five months there is an increase of 24,752 tons over the Output for the same period last year, and of 68,160 tons over that of 1879. As contrasted with 1873, which was then considered a pe- riod of extraordinary briskness, this year surpasses that by 36,560 tons. Of the ves- sels launched there are 24 steamers of 31,005, tons and 7 sailing vessels of 4,430 tons. ‘The inost important vessels launched were the City of Chicago, an Inman Liner of. 5,600 tong, and a Clan Liner, the Clan Macpher- son, of 3,880 tons. The average size of the vessels Inunched was 1,143 tons for the month, and 1,320 tons for the five months, as against 1,155 tons and 1,367 tons respec- tively, in 1882, and 1,615 tons and 1,605 tons in 1873, ‘There are 142 vessels at present in course of construction, being a decrease of §.as contrasted with the number building at the end of April, and 12 less thar at the close ot May 1882. A private dispatch from Detroit says tle schooner Hercules, sunk by the propeller Clarion of the Anchor Line, was insured for $2,000 in the ‘'hames and Mersey. ‘The Clar- ion is held responsible tor the disaster. ‘The agents vf the Anchor Line have made 2 proposition for settlement of the claim, but it is not yet uccepted by the owner of the Hercules. GLOBE IRON WORKS, Iron Shipbuilders, Machinists, Founders and Boiler Makers, Corner Elm and Spruce Sts., Cleveland, 0. F. x H. BORN, PLUMBERS. Manufacturers of Hotel Ranges & Laundry Stoves, ald Dealer in HOUSE FURNISHING GOODS, 128 SUPERIOR S¥’., CLEVLAND, O. CANFIELD Wrecking & Towing Line, MANISTEE, MICH, ere Tugs, Hawsers, Lighters, Steam Pumps, Lifting Screws, &e., To be had on short notice, by mail or telegraph. CHAS, GNEWUCH. Wrecking Master. A. 0. WHEELER, Manager. NOTICE TO STEAMBOAT AND VESSEL OWNERS. DEAN & COMPANY’S DIAGONAL LIFE BOAT CAN BE USED IN PLACE OF THE METALLIC LIFE BOAT IF | PREFERED, HAS BEEN ADOPTED AT WASH- INGTON BY THE BOARD OF SU- PERVISING INSPEC- TORS. Yawl & Pleasure Boats on hand, SEND FOR PRICE LIST. DEAN AND CO., DETROIT, MICH. MECHANICAL NEWS. [ILLUSTRATED] $1.00 PER YEAR With Premium. Sample Copies Free. JAMES LEFFEL & CO. No. 110 Liberty St., New York, N. Y. Vesselmen SHOULD HAVE OUR MARINE LAW BOOK, Containing all points of MARINE LAW as de- termined by the United States Courts ——— On — Seamen, Owners, Freights i Sasterss ‘owage, Bi Collisions, Enroliments, General Average, Common Carriers, Duties of Seamen, Masters & Owners, Bill of Luding, Wages, &c. The volumn is handsomely bound in stiff Board covers, and fine English cloth binding. Hooks of this kind generally cost $3.00, hut we will sénd it to an address, postage paid for $1.25, or with the MARINE RECORD for one year, both for only $3.00. Address MAningE Racorp. Cleveland 0. CONSUMPTION POSITIVELY CURED All sufferers from this disease that are anxious to be cured should try DR. KISSNER’S CELEBRATED CONSUMPTION POWDERS, These Powders are the only preparation known that will cure consumption and all diseases of the THROAT and LUNGS—indeed, so strong is our faith in them. and also to convince you that they are no humbug, we will forward to every sufferer, by mail, post paid, a Free Trial Box. Wedoo’t want your money until ie are perfectly sat- isfied of their curative powers. lf your life is worth saving, don’t delay in giving these POWDERS 4 trial as they will surely cure you. Price, for large Box, $3.00 or 4 Boxes for $10 00. Sent to any patt of the United States or Canada, by mail, op receipt of price. Address. ASH & ROBBINS. 360 Fulton St.. Brooklin. M. Y. FTTS, EPILEPSY, OR FALLING SICKNESS ENTLY CURED—NO HUMBUG —b; nA usage of DR. GOULARD'S Celebrated Infa llible Fit kowders. To convince sufferers that these Powders will do all we claim for them we will send them by mail, post paid, a Free Trial Box. As Dr. Goulard is the only Physician that has ever made this disease a special study, and as to. our knowledge thousands have been permanently cured by the use of these Powders, we ot apapraites @ permanent oure in every case or ref nd your all money ex- pended. All sufferers should give these Powders an tarly trial, and be convinced of theircurative power Price, for large Box, $8 00 or 4 Boxes for $10.00. ~ nt by mail to any part of the United States or Canad: on receipt of price, or by express C. O. dD. Addres 5, ASH & ROBBINS, 368 Fulton St., Brooklin, N. Y. JOHN COON» STATIONARY. Paper Mill Bleachers & Rotaries. Gasometers ,Salt Pans Smoke Stacks. And all kinds of Heavy Plate & Sheet IronWork, OFFICE & WORKS, 244.246. 248. 250.252.And. 254. WM. WALL'S SONS. CORDAGCE *x OAKUM. Gangs of AMERICAN, RUSSIA and ITALIAN HEMP of the very best quality made tv order AT ONE DAY'S NOVICE. MANILA andSISAL BINDER TWINE. Office No. ¢13 WALL STREET, NEW YORK. Factory, Brooklyn, N. Y. ROBY. TARRANT. Marine and Stationary Engines, MANUFACTURER OF PROPELLER WHEELS, VESSEL PUMPS &.GENERAL MACHINERY. CORRESPONDENCE SOLICITED, 55, 57 &59 Michigan St. CHICAGO ILL. NO ENGINEER Should be Content to run a Boiler, stationary or Marine, without HOUGHTON’S BOILER AND TUBE COMPOUND, Which keeps it free from Scale, Mud or Sediment, Prevents foaming and lessens the liability of Explosion. It saves FUEL, LABOR and RE- PAIRS. It is PURELY VEGETABLE and Absolutely Safe. Send for Circular giving full information to HOUCHTON & CO, . Sole Proprietors and Manufacturers 130 Reade St., cor. Hudson, NEW YORK, THE MARINE LAW BOOK —IS NOW READY.— SEND YOUR ORDERS TO THE MARINE RECORD. If You Want the Best STEAM PUMP For Mining, Rallroad or Steamboat use, Paper Mill, Chemical or Gas Works Tannery, Brewery ors r Refinery, Draining Quarries, Cellars or Planta- tions, Irrigating or Hydraulic ining, Sinking Foundations Coffer D: Sewer, Well Sinking .and other Contractors Work, or Raising ater for any kind of Manufacturing or Fire Purpose, write for an illus trated descriptive book on the NEW PULSOMETER, containing greatly reduced prices, hundreds of testimonials. etc. Mailed free. Prices 100 per cent. lower than other. Every pump tested before shipment and guaranteed as represented, ECONOMY AND EFFICIENCY UNEQUALED. Pulsometer Steam Pump Co., 88 John St., New York City, U. S. A. Aa Seo Prices next issue of this Paper.-6e 2 OIL STILLS & AGITATORS. Repairing Promptly Attended to. BUFEALO, NY, NAN? SGP Noetaaaan 5 Yo &9,000.BbIS AES ESTABLISHED 1830, Breckenridge, Mich Carrollton, Mich. DeGRAUW, AYMIAR & CO, MANUFACTURERS AND IMPORTERS OF CORDAGE, OAKUM, ANCHORS, Wire Rope, Chains, Oars, Blocks, Buntings, RUSSIA BOLT-ROPE, FLAGS, COTTON & FLAX DUCKS, MARINE HARDWARE AND SHIP CHANDLERS’ GOODS GENERALLY ee : Nos 34 & 35 SOUTH ST., NEW YORK- THE CLEVELAND WHEELBARROW and TRUCK CO. OF St. Mary’s, Ohio. OAR FACTORIES. : Montpelier, Ohio. MANUFACTURERS ALL KINDS OF WHEELBARROWS AND TRUCKS OFFICE AND WORKS, 547 DETROIT ST., FOR ALL PURPOSES CLEVELAND, OHIO, Mention this Paper,