The Young Mill-wright and Miller's Guide

Oliver Evans

Lea & Blanchard, 1848 - Flour mills - 392 pages

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Preliminary remarks	9

On the essential properties of bodies	10

Axioms or laws of motion and rest	13

On absolute and relative motion	14

On momentum 6 On power or force and on the motive power 7 On the effect of collision or impact 8 On compound motion	18

Of falling bodies PAGE 9 10	21

Of spouting fluids	22

19	23

Of bevel gears	191

Of matching wheels to make the cogs wear equally	193

Of rolling screens and fans	194

Of gudgeons preventing their heating c	199

Building mill walls	201

PART III	203

ARTICLE PAGE 89 Application of the machines in manufacturing flour	208

Elevating grain from ships	211

Of the motion of projectiles 13 Of circular motion and central forces	27

Of the centres of magnitude motion and gravity	30

Of the mechanical powers 16 Of the lever	32

General rules for computing the powers of an engine	33

General rules for computing the powers of an engine 18 Of the different kinds of levers	34

Compound levers	35

Calculating the power of wheel work	37

Power decreases as motion increases	38

No power gained by enlarging undershot waterwheels	39

No power gained by enlarging undershot waterwheels 23 No power gained by double gearing 24 Of the pulley 25 Of the wheel and axle	41

Of the inclined plane 27 Of the wedge	42

Of the screw	43

Of the flywheel and its use	44

On friction	45

Seventh law of spouting fluids demonstrated	46

On the friction of different substances	47

Mechanical contrivances to reduce friction	48

Practical results of equal pressure	49

Of maximums	50

To find the velocity of spouting fluids	51

Effect of water under a given head	52

Water appied to act by gravity	53

Principles of overshot mills	54

Investigation of old theory 35 New theory doubted	55

Pressure of the air on fluids	56

True theory attempted 37 Scale of experiments	57

Conveying water under valleys and over hills	58

Definite and indefinite quantities of water striking a wheel	59

Motion of breast and pitchback wheels	60

Calculating the power of a mill seat	61

Theory and practice compared	62

Observations and experiments on mills in practice Table of the area and power of mill stones	63

On canals for conveying water to mills	64

On their size and fall	65

Of air pipes to prevent trunks from bursting	66

Smeatons experiments concerning undershot wheels 68 69 66 66 66	67

Warings theory	68

The same continued 40 Doubts respecting it 41 True theory further sought for 42 66 deduced	70

windmills PAGE	74

Finding the velocity of a wheel theorem for	75

50	88

51	89

REAAAAAH588Q2344787K65888JFP 71	90

31	99

PART II	139

Of the different kinds of mills	153

Of overshot mills with a table of their proportions and powers 71 Of tubmills with a similar table 72 Of breast and pitchback wheels with a table for t...	181

The same subject with a table 77 Measuring the contents of garners hoppers	187

The same continued	189

A mill for grinding parcels	213

On elevating from ships c by horse power	215

On the same by manual power	218

meal conveyer	231

grain conveyer	233

hopperboy	234

drill	236

Utility of these machines	238

Bills of materials for their construction	240

Mills for hulling and cleaning rice	243

Explanation of the principle of grinding	247

Of the draught necessary to be given to the furrows of millstones	250

Of facing millstones	254

Of hanging do	256

Of regulating the feed and water in grinding	258

Rule for judging of good grinding	259

Of dressing and sharpening the stones when dull	260

Of the most proper degree of fineness for flour	261

Directions for grinding wheat mixed with garlic c	262

Of grinding middlings over c	264

Of the quality of millstones to suit that of the wheat	267

Of bolting reels and cloths with directions for bolting and inspecting flour	269

The duty of the miller	272

Peculiar accidents by which mills are subject to catch fire	274

Observation on improving mills	275

Prefatory remarks	277

Undershot mills and laying on the water	280

Directions for making forebays	281

Principle of undershot mills	282

Of breast wheels	285

Of pitchback wheels 586	286

On the motion of overshot wheels	287

Of gearing	288

Diameter of pitch circles	289

Table for overshot mills of different falls c c	291

129 Constructing undershot wheels	296

Dressing shafts	298

for putting in gudgeons	308

149	310

Of the use of draughting to build mills	321

Explanation of the plates	328

Of sawmills with a table of the dimensions of flutterwheels	332

Of fullingmills	340

On the construction of waterwheels by W Parkin c	362

On the distance which bodies fall and the velocities acquired in consecu	366

Strength and durability of the teeth of wheels	372

Of making patterns for castiron	378

On reaction wheels extracted from Franklin Journal	384

Finding the velocity of a wheel theorem for	399

Common terms and phrases

12 inches angle aperture ARTICLE body bolting bottom bran bran pass buckets bushels cast iron central forces centre circumference cog-wheel column conveyed conveyer cubic feet cubochs distance divided double draught drive effect elevator equal equilibrio fall feet diameter feet long feet of water feet per second feet stone float flour fluids foot friction furrows garner gate gear give grain gravity grinding gudgeons half hoisted hole hopper hopper-boy inch thick inches diameter inches long inches wide leading wheels lever load logs lower maximum meal mill mill-stones mill-wrights minute mortises motion move multiplied nearly non-elastic number of cogs OLIVER EVANS overshot wheel pass penstock perpendicular descent pitch circle Plate pressure principles produce proportion pulley ratio reels revolutions per minute round shute side spindle spout square root strap strike superfine suppose theory trundle undershot wheel velocity wallower water-wheel weight wheat whole

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Page 126 - Experience confirms that this velocity of 3 feet in a second is applicable to the highest overshot wheels, as well as the lowest ; and all other parts of the work being properly adapted thereto, will produce very nearly the greatest effect possible : however, this also is certain from experience, that high wheels may deviate further from this rule, before they will lose their power, by a given aliquot part of the whole, than low ones can be admitted to do ; for a wheel of 24 feet high may move at...‎

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Page 179 - These five machines are variously applied, in different mills, according to their construction, so as to perform every necessary movement of the grain, and meal, from one part of the mill to another, or from one machine to another, through all the various operations from the time the grain is emptied from the wagoner's bag, or from the measure on board the ship, until it be completely manufactured into flour, either superfine or of other qualities, and separated, ready for packing into barrels, for...‎

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Page 17 - When the prop is at one end of the lever, the power at the other, and the weight between them.‎

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Page 102 - But in this case it is very necessary to distinguish the circumstances in which a model differs from a machine in large ; otherwise a model is more apt to lead us from the truth than towards it.‎

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Bibliographic information

Title	The Young Mill-wright and Miller's Guide
Author	Oliver Evans
Editor	Thomas P. Jones
Edition	12
Publisher	Lea & Blanchard, 1848
Original from	Harvard University
Digitized	9 Nov 2005
Length	392 pages

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The Young Mill-wright and Miller's Guide

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