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We take pleasure in adding our names to the list of recommendations of Haswell's Engineers' and Mechanics' Pocket Book, which we consider the best of the kind. I P. MORRIS & Co.,

Steam Engine Manufacturers,
Philadelphia, Penn.

With much pleasure we add our testimony to the value of Has. well's Engineers and Mechanics' Pocket Book, which we are gratified to learn is about to be published in a fifth edition, as each succeeding issue contains valuable additions to the preceding.

There are several valuable English works of this description, but the peculiarities and differences in this country render his a far more useful book; we consider it, in fact, an almost indispensable pocket companion.

MURRAY & HAZLEHURST, Vulcan Works, Baltimore, Md.

We concur in recommending Haswell's Engineers' and Mechanics' Pocket Book, and consider it a very useful and valuable work. A. & C. REEDER,

Steam Engine Manufacturers,

Baltimore, Md.

In the daily use of Haswell's Engineers' and Mechanics' Pocket -Book, we concur in the recommendation of it as one of very general reference and great utility ; it is an indispensable pocket com. panion.

REANEY, NEAPE & Co., Penn Works, Kensington, Phila August, 1848.

CONTENT S.

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13 Ellipse...

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CONIC SECTIONS.
NOTATION.........

11
Construction of Figures ......

4€
EXPLANATIONS OF CHARACTERS... 12 Definitions ..

50

To construct a Parabola...
U. S. WEIGHTS AND MEASURES. To construct a Hyperbola...

54

51
Measures of Length...

Parabolas.

50
Measures of Surface.

14
Measures of Capacity

14 Hyperbolas
Measures of Solidity

15
Measures of Weight

15 MENSURATION OF SURFACES.
Miscellaneous

16

Triangles, Trapeziums, and Trape-
Measures of Value

16
zoids

59
Mint Value of Foreign Coins.. 16 Regular Polygons

60

Regular Bodies, Irregular Figures,
FOREIGN WEIGHTS AND MEASURES. and Circles

61
Arcs of a Circle..

62
Measures of Length

17

Sectors, Segments, and Zones...... 63
Measures of Surface
18 Ungulas and Ellipses...

64
Measures of Capacity.

18
Parabolas and Hyperbolas...

65
Weasures of Solidity

19 Cylindrical Rings and Cycloids....
Measures of Weight..

20 Cylinders, Cones, Pyramids, Spheres,
SCRIPTURE AND ANCIENT MEAS and Circular Spindles ....

67
URES....

21

By Mathematical Formule.
Table for finding the Distances of

Lines

of Circle, Ellipse, and Para-
Objects at Sea....
21 bola.

67
Reduction of Longitude

22 | Areas of Quadrilaterals, Circle, Cyl-

inder, Spherical Zone or Segment,
VULGAR FRACTIONS

23 Circular Spindle, Spherical Tri-
DECIMAL FRACTIONS

26 angle, or any Surface of Revolu-
tion....

68
Duodecimals..........

30
Capillary Tube.

69
RULE OF THREE.....
31 | Useful Factors..

69
Compound Proportion

32 Examples in Mensuration....... 70
Involution

32
Evolution...

32 AREAS OF THE SEGMENTS OF A
Arithmetical Progression...
34 CIRCLE

72
Geometrical Progression

35 LENGTHS OF CIRCULAR ARCS ...... 75
Permutation:

36
Combination

36

To find the Length of an Elliptic
Position
36

77
Fellowship

37 | LENGTHS OF SEMI-ELLIPTIC ARCS.. 78
Alligation

38

AREAS OF THE ZONES OF A CIRCLE. 80
Compound Interest.

38
Discount.

39
Equation of Payments.

39

MENSURATION OF SOLIDS.
Annuities

40

Of Cubes and Parallelopipedons.... 81
Perpetuities...

41
Chronological Problems ....

Regular Bodies...

81
41
To find the Moon's Age

Cylinders, Prisms, and Ungulas 81
42
"Cones and Pyramids..

82
Table of Epacts, Dominical Letters,

* Wedges and Prismoids.

83
&c.

42
Promiscuous Questions...

83
Spheres
43
Spheroids

84
Circular Spindles.

85
GEOMETRY.

* Elliptic Spindles ..
Definitions....

46 " Parabolic Conoids and Spindles. 86

Curve........

.........

We take pleasure in adding our names to the list of recommendations of Haswell's Engineers' and Mechanics' Pocket Book, which we consider the best of the kind. 1. P. MORRIS & Co.,

Steam Engine Manufacturers,

Philadelphia, Penn.

With much pleasure we add our testimony to the value of Haswell's Engineers' and Mechanics' Pocket Book, which we are gratified to learn is about to be published in a fifth edition, as each succeeding issue contains valuable additions to the preceding.

There are several valuable English works of this description, but the peculiarities and differences in this country render his a far more useful book; we consider it, in fact, an almost indispensable pocket companion.

MURRAY & HAZLEHURST, Vulcan Works, Baltimore, Md.

We concur in recommending Haswell's Engineers' and Mechanics' Pocket Book, and consider it a very useful and valuable work. A. & C. REEDER, { Steam menginga. Manufacturers,

Baltimore, Md

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In the daily use of Haswell's Engineers' and Mechanics' Pocket -Book, we concur in the recommendation of it as one of very gen. eral reference and great utility; it is an indispensable pocket companion.

REANEY, NEAME & Co., Penn Works, Kensington, Philą. August, 1848.

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Pag

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Page

CONIC SECTIONS.

NOTATION....

11

Construction of Figures .......

4

EXPLANATIONS OF CHARACTERS... 12 Definitions ....

To construct a Parabola...

54

U. S. WEIGHTS AND MEASURES. To construct a Hyperbola.

54

55

Measures of Length..

Parabolas..........

le Measures of Surface.

14

Measures of Capacity

14 Hyperbolas

Measures of Solidity.

15

Measures of Weight

15 MENSURATION OF SURFACES.

Miscellaneous..

16

Triangles, Trapeziums, and Trape-

Measures of Value

16

zoids

59

Mint Value of Foreign Coins....... 16

Regular Polygons

60

Regular Bodies, Irregular Figures,

FOREIGN WEIGHTS AND MEASURES. and Circles ..

61

Measures of Length.........

Arcs of a Circle...

62

17

Sectors, Segments, and Zones ...... 63

1 Measures of Surface

18

Measures of Capacity.

Ungulas and Ellipses....

64

18

Parabolas and Hyperbolas ....

65

ei Measures of Solidity

19

Measures of Weight....

Cylindrical Rings and Cycloids.... 66

20

Cylinders, Cones, Pyramids, Spheres,

ED

SCRIPTURE AND ANCIENT MEAS and Circular Spindles...

67

URES....

21

By Mathematical Formule.

Table for finding the Distances of Lines of Circle, Ellipse, and Para-

Objects at Sea.....

21

67

Reduction of Longitude

22 | Areas of Quadrilaterals, Circle, Cyl-

inder, Spherical Zone or Segment,

VULGAR FRACTIONS

23 Circular Spindle, Spherical Tri-

DECIMAL FRACTIONS .......

26 angle, or any Surface of Revolu-

tion...

68

Duodecimals.

30 Capillary Tube..

69

RULE OF THREE.

31 Useful Factors ..

69

Compound Proportion ...........

32 Examples in Mensuration

Involution

32

Evolution.

32 AREAS OF THE SEGMENTS OF A

Arithmetical Progression.

34 CIRCLE

72

Geometrical Progression

35 LENGTHS OF CIRCULAR ARCS ...... 75

Permutation..

36

Combination

36

To find the Length of an Elliptic

Position ................

36

Curve.......

Fellowship

37 LENGTHS OF SEMI-ELLIPTIC ARCS.. 78

Aligation

38

AREAS OF THE ZONES OF A CIRCLE. 80

Compound Interest............ 38
Discount

39

Equation of Payments..

39

MENSURATION OF SOLIDS.

Annuities.

40

Perpetuities

Of Cubes and Parallelopipedons.... 81

- Regular Bodies...

81

41

Chronological Problems..

To find the Moon's Age

Cylinders, Prisms, and Ungulas 81

Cones and Pyramids..

82

Table of Epacts, Dominical Letters,

" Wedges and Prismoids.

83

&c.

42

Promiscuous Questions ...

Spheres..

83

43

Spheroids

84

Circular Spindles ..........

85

GEOMETRY.

5

4 Elliptic Spindles

Definitions...

46 Parabolic Conoids and Spindles. It

70

Page

HYDROSTATICS.

Of Hyperboloids and Hyperbolic Co-

noids.

86 Of Pressure......

167

Cylindrical Rings.

87 Construction of Banks.

168

By Mathematical Formule.

87 Flood Gates.

168

Cask Gauging:

88 Pipes ...

168

Examples in Mensuration.

89 Hydrostatic Press......

169

AREAS OF CIRCLES.

91 HYDRAULICS AND HYDRODYNAMICS.

CIRCUMFERENCES OF CIRCLES..... 95 Of Sluices

170

170

SQUARES, CUBES, AND Roots......

99 of Vertical Apertures or Slits.....

Of Streams and Jets ...

171

To find the Square of a Number Velocity of Streams.

171

above 1000..

116 To find the Velocity of Water run.

To find the Cube or Square Root of ning through Pipes..

172

a nigher Number than is contain Waves

172

ed in the Table.

118 Table showing the Head necessary

To find the Cube of a Number above

to overcome the Friction of Water

1000 ....

118

in Horizontal Pipes.

173

To find the Sixth Root of a Number 118 General Rules ....

174

To find the Cube or Square Root of Table of the Rise of Water in River's 175

a Number consisting of Integers

WATER WHEELS.

176

and Decimals.

119

176

SIDES OF EQUAL SQUARES.

120

To find the Power of a Stream.....

Barker's Mill....

178

PLANE TRIGONOMETRY

123 To find the Centre of Gyration of a

Oblique-angled Triangles...... 124

Water Wheel.

179

Notes ...

179

NATURAL SINES, COSINES, AND TAN-

GENTS ........

125

PNEUMATICS.

Sines and Secants ..

127

Weight, Elasticity, and Rarity of

MECHANICAL POWERS.

Air..

180

Measurement of Heights by means

Lever.

128

of the Barometer.

181

Wheel and Axle.....

130

Velocity and Force of Wind. 181

Inclined Plane

131

Wedge.

133

STATICS.

Screw

133

Pulley

135 Pressure of Earth against Walls.. 182

DYNAMICS

183

CENTRES OF GRAVITY.

PENDULUMS ...:

185

Surfaces

Solids..is

138 CENTRE OF GYRATION.

186

GRAVITATION..

139 CENTRES OF PERCUSSION AND Os-

CILLATION:..

188

Promiscuous Examples.

142

190

Gravities of Bodies..

143 CENTRAL FORCES.

Specific Gravities...

143 Fly Wheels......

192

Proof of Spirituous Liquors .... 144 | Governors

192

TABLE OF SPECIFIC GRAVITIES ..... 145

GUNNERY

STRENGTH OF MATERIALS.

FRICTION

194

Tensile Strength

148

Transverse Strength..

149

HEAT,

Deflexion

156

Communication of Caloric.: 196

Journals of Shafts

158 Radiation of Caloric..

197

Gudgeons and Shafts.

160 Specific Caloric.....

197

TEETH OF WHEELS.....

161 Evaporation:

200

Congelation and Liquefaction: 200

Velocity of Wheels.

162 | Distillation

200

Strength of Wheels ..

163

Miscellaneous

201

General Explanations concerning

Melting Points of Alloys.

201

Wheels....

164

For Warming Apartments

202

GUNPOWDER:...

203

HORSE POWER.

165

Dimensions of Powder Barrels.... 203

ANIMAL STRENGTH.

LIGHT........

204

Alen......

165

Horses.............

voor 166 TONNAGE - .

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