DESIGNS PATENTED.

10,030 to 10,032.—Embroidery.—E. Crisand, New Haven, Conn.
10,033.—Lock-Case.—R. Flocke, Newark, N. J.
10,034.—Bottles.—J. H. Harrison, Davenport, Iowa.
10,035 to 10,037.—Carpet.—H. S. Kerr, Philadelphia, Pa.
10,038, 10,039.—Carpets.—T. J. Stearns, Boston, Mass.
10,040.—Moulding.—R. M. Merrill et al., Laconia, N. H.
10,041 to 10,044.—Oil Cloth.—C. T. Meyer et al., Bergen, N. J.
10,045.—Studs, etc.—J. W. Miller et al., Newark, N. J.
10,046.—Book Cases.—J. W. Schuckers, New York city.

[A copy of any one of the above patents may be had by remitting one dollar to Munn & Co., 37 Park Row, New York city.]

Inside Page, each insertion - - - - 75 cents a line.
Back Page, each insertion - - - - $1.00 a line.

Engravings may head advertisements at the same rate per line, by measurement, as the letter press. Advertisements must be received at publication office as early as Friday morning to appear in next issue.

THE SCIENTIFIC

Grain & Middlings Mill.

12, 20, and 30 inch Mill Stones.

Sent on trial to responsible parties,and warranted the full equalof any heavy mill built in the world.Send for our price list, as this maynot appear again.

A. W. STRAUB & CO.,
1361 Ridge Avenue, Phila, Pa.

NO MORE SLIPPING BELTS. MY NEWPatent Pulley Cover will do double the work before thebelt will slip. Put on without disturbing shafting.Agent wanted in every city. Circulars free.

JOHN W. SUTTON, 95 Liberty St., New York.

THE NEW GERMAN PATENT LAW.

Being the Full Text of the New Law for Patents, passedJuly 1st, 1877, covering all the States of the GermanEmpire. Contained in Scientific American SupplementNo. 80. Price 10 cents. To be had at this officeand of all newsdealers.

Price list mailed on application to Jones & Laughlins,Try Street, 2d and 3rd Avenues, Pittsburgh, Pa.190 S. Canal Street, Chicago, Ill., and Milwaukie, Wis.

Stocks of this shafting in store and for sale by
FULLER, DANA, & FITZ, Boston, Mass.
GEO. PLACE & CO. 121 Chambers St., N. Y.

EUREKA SAFETY POWER!

Practically impossible to explode.Tested to 300 lbs. pressureper square inch. 2-Horse Power,$150, 3 to 4 H.P., $250. Also,Stationary Engines and boilers, andSpark Arresting Portable Enginesfor plantation use. Send forour circular. Discount to the trade.

B. W. PAYNE & SONS,

Corning, N. Y.


SIZING OF COTTON GOODS. READbefore the Society of Arts by W. Thompson, F.R.S. Amost Full and Clear Description of the process, embracing:An account of the process of Weaving, explainingthe object and utility of Size. A table of Sizing Mixtures,in which are enumerated the Substances used:1, for giving Adhesive properties to Size; 2, to giveWeight and Body to the Yarn; 3, for Softening the Sizeor Yarn; and 4, for Preserving the Size from Mildew andDecomposition. Tests for these Substances, and Directionsfor Preparing, so as to obtain the results required.Proportions of Sizing. Use of Flour in Size. WeightingMaterials, China Clay and its substitutes. "Softenings,"and Oils for Softening. East Winds and their effect.Glycerine, Grape Sugar, Mildew Preventives, and TapeSizing. "Slashing," Packing, Damaged Goods, etc. Containedin Scientific American Supplement No. 80.Price 10 cents. For sale at this office and of all newsdealers.

CELEBRATED FOOT LATHES.

Foot Power Back-geared ScrewLathes, Small Hand and Power Planersfor Metal, Small Gear Cutters,Slide-rests, Ball Machine for Lathes,Foot Scroll Saws, light and heavyFoot Circular Saws. Just the articlesfor Amateurs or Artisans. Highlyrecommended. Send for illustratedCatalogues.

N. H. BALDWIN, Laconia, N. H.


$66 a Week in your own town. Terms and $5 outfitfree. H. HALLETT & CO., Portland Maine.


SAVE OIL. USE TOMLINSON'SCar Axle Box. Cars run for 3 cents for a thousandmiles. See Car Builder for June, 1877. Address

J. B. TOMLINSON, 80 White St., N. Y.

Dayton Cam Pump


The Only Pump in the Market Designedand Constructed Especially for BoilerFeeding.

Are Pumping water at 268° F. No Dead Centers.The Steam Valve is a plain Slide Valve,identical to the slide valve of a Steam Engine,but derives its motion from a cam.Speed can be regulated to suit evaporation.

Pumping Returns from Steam Heating Apparatus a specialty.

Send for Circular.

Smith, Vaile & Co.,

DAYTON, OHIO.


What 25 cents Will Buy!

THE SCIENTIFIC AMERICAN REFERENCE BOOK.

price twenty-five cents.

This is a most useful Little bound book of 150 pages,comprising, probably, the most extensive variety ofstandard, practical, condensed information ever furnishedto the public for so small a price. Contents:

1. The Last Census of the United States (1870),by States, Territories and Counties. in full, showingalso the area in square miles of each State and Territory.

2. Table of Occupations.—Showing the occupationsof the people of the United States, and the number ofpersons engaged in each occupation. Compiled fromthe last census.

3. Table of Cities, having over 10,000 inhabitants.Compiled from the last census.

4. Map of the United States. Miniature outline.

5. The United States Patent Laws (full text).—PrincipalOfficial Rules for Procedure; Directions Howto Obtain Patents, Costs, etc.; Forms for Patents andCaveats: How to Introduce and Sell Inventions; Formsfor Assignments; Licenses; State, Town, County, andShop Rights; General Principles applicable to Infringements;Synopsis of the Patent Laws of Foreign Countries;Rights of Employers and Employes in respect toInventions.

6. The Ornamental Design Patent Law (fulltext).—Costs and Procedure for securing Design Patentsfor Ornamental Productions such as Designs for TextileFabrics, Patterns for Wood and Metal Work, NewShapes and Configurations of any article of Manufacture,Prints, Pictures, and Ornaments, to be printed, woven,stamped, cast, or otherwise applied upon machinery,tools, goods, fabrics, manufactures.

7. The United States Trade-Mark Law (fulltext).—With Directions, Proceedings and Expenses forthe Registration of Trade-Marks of every description.

8. The Label Copyright Law (full text).—WithDirections, Proceedings and Cost of Registering Labelsfor Goods. Medicines, and Merchandise of all kinds.

9. The General Copyright Law of the UnitedStates (full text).—With Directions and Costs forSecuring Copyrights by Authors for Books, Pamphlets,Charts, Photographs, Pictures, and Works of Art.

10. The Principal Mechanical Movements.—Describedand illustrated by 150 small diagrams, of greatvalue to Inventors and Designers of Mechanism.

11. The Steam Engine.—With engraving, showingall the parts, names, etc., and a brief history of the Inventionand Progress of Steam Power.

12. Geometry, as Applied to Practical Purposes.With illustrations.

13. Horse Power.—Simple Rules for Calculating theHorse-Power of Steam Engines and Streams of Water.

14. Knots.—Presenting engravings of 48 differentkinds of Rope Knots, with explanations as to tying.

15. Tables of Weights and Measures.—Troy,Apothecaries', Avoirdupois, French, Weights; U. S.Standard; Dry Measure; Land Measure; Cubic Measure;Liquid Measure; French Square Measure; French Cubic,or Solid Measure; Measuring Land by Weight; Engravingof a section of English and French rule, ofequal length.

16. Valuable Tables: (1) Velocity and Force of theWind. (2) Specific Gravity and Weight, per Cubic footand Cubic inch, of the principal substances used in theArts (3) Heat-conducting Power of various Metalsand other Solids and Liquids. (4) Table of the MineralConstituents absorbed or removed from the Soil, peracre, by different crops. (5) Table of Steam Pressuresand Temperatures. (6) Table of the Effects of Heatupon various bodies, melting-points, etc.

17. Medallion Portraits of DistinguishedAmerican Inventors, with biography in brief andengravings of their inventions, viz.: Franklin, Fulton,Whitney, Wood, McCormick, Blanchard, Winans, Morse,Goodyear, Howe, Lyle, Eads.

18. Engravings of Capitol, Washington, with briefhistory, dimensions, cost, etc.; United States PatentOffice, interior and exterior views, dimensions, anddescription; Scientific American Buildings, N. Y. andWashington.

19. Miscellaneous Information.—Force of Expansionby Heat; Small Steam-boats, proper dimensions ofEngines, Boilers, Propellers. Boats; Incubation, Temperatureof; To Make Tracing Paper; Constituents ofvarious substances; Friction, how produced, and Rulesfor Calculation; Specific Heat Explained; SpecificGravity of Liquids, Solids, Air, and Gases; Gunpowder—Pressure,Heat, and Horse-Power of; Copying Ink, toMake; Heat, its mechanical equivalent explained;Molecules of Matter, size and motion explained; Lightningand Lightning Rods—valuable information; Valueof Drainage Explained; Amount of Power at presentyielded from Coal by best Engines; Sound—its velocityand action; Liquid Glues, Recipes; Value of Brains;Properties of Charcoal; Height of Waves; Speed ofElectric Spark, etc.; Plain Directions, with Engravings,showing how any person can make Electro-Magnetsand Electric Batteries at a cost of a few cents; ValuableRecipes.

The Scientific American Reference Book, price only 25cents, may be had of News Agents in all parts of thecountry, and of the undersigned. Sent by mail on receiptof the price.

Address MUNN & CO., 37 Park Row, New York.

THE SECOND GREAT SALE

OF PATENTS AT

AUCTION

Will take place at the Auction Rooms of GEO. W.KEELER, 53 Liberty St., N. Y., on July 16, at 12 o'clock.Models now on exhibition. Send for Catalogue.

WOOD & LIGHT

Machine Co.

WORCESTER, Mass.

Manufacture of all kinds of

Iron-WorkingManchinery,

including many novelties.

Shafting, Pulleys, &c.

Send for Circulars.

$95 A month and expenses.
CANDY 		SALESMAN WANTED
to sell to DEALERS. SAMPLES FREE.
& NOVELTIES LETTERS must have
enclosed return postage.

H. SMITH & CO., CONFECTIONERS, Cincinnati, O.

Engine Lathes, Planers, Drills, &c. Send for Catalogue. DAVID W. POND, Successor to LUCIUS W. POND. Worcester, Mass. STEAM PUMPS. FIRST PRIZES, CENTENNIAL, PHILA., VIENNA,
PARIS, NEW YORK, BALTIMORE, BOSTON. Send for circular of recent patented improvements, THE NORWALK IRON WORKS CO., Prices Reduced. South Norwalk, Conn. N. F. BURNHAM'S 1874 WATER WHEEL Is declared the "standard turbine," by over 600 persons who bought and use them with part and full gate open. Pamphlets Free. N. F. BURNHAM, York, Pa. OTIS' SAFETY HOISTING
Machinery OTIS BROS. & CO., No. 348 Broadway, New York. $55 $77 a week to Agents. $10 Outfit Free.
P. O. VICKERY, Augusta Maine. WE ENAMEL in FINE JET BLACK every variety of turned woodwork parts of machinery, castings; tinware and other metal work ENAMELED JET GOODS, in wood or metal, made to order AMERICAN ENAMEL Co. 17 Warren St PROVIDENCE, R. I. 50 MIXED CARDS, with name, 10c. and stamp.
Agent's Outfit, 10c. COE & CO., Bristol, Ct.
WE ENAMEL in FINE JET BLACK every variety of turned woodwork parts of machinery, castings; tinware and other metal work ENAMELED JET GOODS, in wood or metal, made to order AMERICAN ENAMEL Co. 17 Warren St PROVIDENCE, R. I.
L. SMITH HOBART, President.
J. C. MOSS, Superintendent.		 NEW YORK

TYPE-METAL RELIEF PLATES.

A SUPERIOR SUBSTITUTE FOR WOOD-CUTS

AT MUCH LOWER PRICES.

These plates are engraved almost entirely by photo-chemical means, thus avoiding the old, slow and tedious method of engraving on wooden blocks, where the workman is compelled to engrave each line separately by cutting away the wood around it, often spending many days upon a plate a few inches square.

In appearance our relief plates are the same as regular stereotypes, being mounted type high on blocks ready to be set up and printed from, with type, on any ordinary press.

They can be used directly and will wear as long as any type-metal plates, but if a great number of impressions are wanted, duplicate