Report ..., Volumes 9-17

Front Cover
U.S. Government Printing Office, 1929

From inside the book

Contents

Foundation supported on wooden blocks
20
Short hemlock piled on doublelength foundations__
21
Width and spacing of lumber piles___
22
Good and poor care of stickers___
23
Power lumber piler or elevator_
26
Airline piling under monorail_
27
Pile stickers and chimneys or tunnels and spacing between boards
28
Portable horse used in piling unit packages_ 16 Sling used for lifting unit packages by cable_
29
Straddle lumber tractor
30
Elevated tramcar helps in piling lumber
31
Improved jack for elevating lumber to top of pile
32
Projection of end stickers____
36
Simple sticker spacing frame
37
Diagram of arrangement of tiers in box piling
39
Side piling
42
Cross section of sidepiled lumber pile
43
Pile shield for end of pile of 3inch cypress
45
Pole stacking for reduction of bluestain damage_
46
Defects produced in lumber by air seasoning__
48
Samples showing checking and honeycombing
49
Section of oak plank showing severe honeycomb_
50
End checking in a cross section of western larch_
51
Partly airdried pile of thick oak with severe end check_
52
Period required for adequate airdrying of lumber
54
Warped lumber produced by crooked sticker course 31 Drying rate chart for Douglas fir_____ 32 Method of piling railroad ties known as 71 or 81
59
Roundedged lumber piled for airdrying
60
Bundle dimension stacked for airdrying outdoors__
61
The kilndrying of lumber at the sawmill
62
Dimension in large stacks end lapped_
63
Short lumber piled herringbone fashion without stickers_
64
Airseasoning yard for stave bolts 42 Stack of stave bolts showing method of stacking
65
Proper piling of squares to reduce surface check__
66
Conventionalized longitudinal section of progressive kiln
69
Progressive kilns____
70
Why the final kilndrying stage needs more heat and less humidity
76
Kiln load piled with narrow vertical vents___
78

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Page 8 - Board, and the Bureau of Foreign and Domestic Commerce of the Department of Commerce.
Page 1 - ... preservative must displace or compress the air in the wood. After the retort is filled, additional preservative is forced into the cylinder by means of pressure pumps, the pressure being gradually raised to and maintained at 125 to 175 Ib.
Page 40 - US DEPARTMENT OF AGRICULTURE. Forest Service. 1920. Timber depletion and the answer. A summary of the report on timber depletion and related subjects prepared in response to Senate Resolution 311. US Dept.
Page 118 - Manual of Design and Installation of the Forest Service Water-Spray Dry Kiln. By LV Teesdale. Department of Agriculture Bulletin 894, October 18. 1920. Price, 10 cents. A good manual for this type of kiln. The Theory of Drying and its Application to the New Humidity Regulated and Recii-culating Dry Kiln.
Page 10 - DC, works in close cooperation with a number of official and private organizations, notably the Bureau of Standards of the Department of Commerce and the Forest Products Laboratory of the Forest Service, Department of Agriculture.
Page 51 - Commerce, comprises about 200 members representing manufacturers, distributors, and consumers of forest products. Its object Is to work for closer utilization of our country's timber resources. The committee, whose headquarters are in the Department of Commerce. Washington, DC, works in close cooperation with a number of...

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