13. HORSE POWER.--Simple Rules for Calculating the Horse-Power of
Steam Engines and Streams of Water.
14. KNOTS.--Presenting engravings of 48 different kinds 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; Engraving of a section of English
and French rule, of equal length.
16. VALUABLE TABLES: (1) Velocity and Force of the Wind. (2) Specific
Gravity and Weight, per Cubic foot and Cubic inch, of the principal
substances used in the Arts (3) Heat-conducting Power of various
Metals and other Solids and Liquids. (4) Table of the Mineral
Constituents absorbed or removed from the Soil, per acre, by
different crops. (5) Table of Steam Pressures and Temperatures.
(6) Table of the Effects of Heat upon various bodies, melting-points,
etc.
17. MEDALLION PORTRAITS OF DISTINGUISHED AMERICAN INVENTORS, with
biography in brief and engravings of their inventions, viz.: Franklin,
Fulton, Whitney, Wood, McCormick, Blanchard, Winans, Morse, Goodyear,
Howe, Lyle, Eads.
18. ENGRAVINGS of Capitol, Washington, with brief history, dimensions,
cost, etc.; United States Patent Office, interior and exterior views,
dimensions, and description; Scientific American Buildings, N. Y. and
Washington.
19. MISCELLANEOUS INFORMATION.-Force of Expansion by Heat; Small
Steam-boats, proper dimensions of Engines, Boilers, Propellers. Boats;
Incubation, Temperature of; To Make Tracing Paper; Constituents of
various substances; Friction, how produced, and Rules for Calculation;
Specific Heat Explained; Specific Gravity of Liquids, Solids, Air, and
Gases; Gunpowder--Pressure, Heat, and Horse-Power of; Copying Ink, to
Make; Heat, its mechanical equivalent explained; Molecules of Matter,
size and motion explained; Lightning and Lightning Rods--valuable
information; Value of Drainage Explained; Amount of Power at present
yielded from Coal by best Engines; Sound--its velocity and action;
Liquid Glues, Recipes; Value of Brains; Properties of Charcoal; Height
of Waves; Speed of Electric Spark, etc.; Plain Directions, with
Engravings, showing how any person can make Electro-Magnets and
Electric Batteries at a cost of a few cents; Valuable Recipes.
_The Scientific American Reference Book,_ price only 25 cents, may be
had of News Agents in all parts of the country, and of the undersigned.
Sent by mail on receipt of the price.
Address MUNN & CO., 37 Park Row, New York,