The scope of the work is twofold:--

Produced by Harry Lame, Greg Bergquist and the Online

Distributed Proofreading Team at https://www.pgdp.net (This

file was produced from images generously made available

by The Internet Archive/American Libraries.)

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| Transcriber's Notes: |

| |

|* Words printed in italics in the original document are represented|

| here between underscores, as in _text_; bold text is similarly |

| represented between =, as in =text=. Small caps in the original |

| have been converted to ALL CAPITALS. |

|* Some of the tables have been laid out differently than in the |

| original book, with every effort made to keep the original data |

| and meaning unchanged. |

|* All inconsistencies in spelling, lay-out, hyphenation, etc. in |

| the original document have been preserved in this text, except |

| when mentioned below. |

|* Changes made to the original text: |

| * page 5: 'and the used of' changed to 'and the use of'; |

| * page 13: 'distance, is it, of course' changed to 'distance, |

| it is, of course'; |

| * page 13: 'four year depreciation' changed to 'four-year |

| depreciation'; |

| * page 16: 'twisting the the rubber' changed to 'twisting of |

| the rubber'; |

| * page 26: 'page --' changed to 'page 25'; |

| * page 39: 'plank' changed to 'planks'; |

| * page 39: 'is handy' changed to 'is a handy'; |

| * page 46, table: 'A.M.' moved down one row, similar to 'P.M.' |

| further down in the table; |

| * Table of Contents: page number '4' changed to '5' (2 changes); |

| * Table of Contents: 'Loading and Hauling' changed to 'Loading |

| and Unloading' as in text; |

| * Table of Contents: 'Fires' changed to 'Tires' as in text. |

|* Footnotes have been moved to directly below the paragraph or |

| table to which they refer. |

|* Other issues: |

| * Page 33 contained a reference to an illustration on page 40, |

| but this page has no illustration. The reference has been |

| changed to 'page 38', which is probably the illustration the |

| author intended. |

| * Both 'Meicklejohn and Brown' and 'Meickeljohn and Brown' occur |

| in the text, as do 'Hillard' and Hilliard'. |

| |

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The Engineering Experiment Station of the University of Washington was

established in December, 1917, in order to coordinate investigations in

progress and to facilitate the development of engineering and industrial

research in the University. Its purpose is to aid in the industrial

development of the state and nation by scientific research and by

furnishing information for the solution of engineering problems.

The scope of the work is twofold:--

(a) To investigate and to publish information concerning

engineering problems of a more or less general nature that would

be helpful in municipal, rural and industrial affairs.

(b) To undertake extended research and to publish reports on

engineering and scientific problems.

The control of the Station is vested in a Station Staff consisting of

the President of the University, the Dean of the College of Engineering

as ex-officio Director, and seven members of the Faculty. The Staff

determines the character of the investigations to be undertaken and

supervises the work. For administrative purposes the work of the Station

is organized into seven divisions--

1. Forest Products

2. Mining and Metallurgy

3. Chemical Engineering and Industrial Chemistry

4. Civil Engineering

5. Electrical Engineering

6. Mechanical Engineering

7. Physics Standards and Tests

The results of the investigations are published in the form of

bulletins. Requests for copies of the bulletins and inquiries for

information on engineering and industrial problems should be addressed

to the Director, Engineering Experiment Station, University of

Washington, Seattle.

Motor Truck Logging Methods Engineering Experiment Station Series, Bulletin No. 12 · 第 1 / 52 题