SUGAR PINE. 19 
seasoned. Heavy thick boards cut from the sapwood are especially 
subject to brown stain, while heartwood boards seldom stain except 
under the ‘‘stickers.”’ 
Table 13 gives the results secured from piles at a representative 
mill in the central Sierras, elevation 2,500 feet. These results 
should be considered simply as illustrations of what has occurred 
under certain specific conditions. The study has not yet progressed 
far enough to allow of general conclusions. 
At this mill all sugar pine is air seasoned. The No. 3 shop and 
better is cut principally 6/4 in thickness, although 4/4, 5/4, 8/4, and 
10/4 material is manufactured. Depreciation increases with the 
thickness of the lumber. 
The piles of No. 3 shop and better were put up with three 2 by 4 by 
16 inch rough-dry white-fir stickers and three 8-inch chimneys. The 
pile foundations had a slope of 1 inch to the foot. Piles were roofed 
and sun covers were used on highest grade material. 
Tasie 13.—Depreciation in various grades of sugar-pine lumber during air seasoning at 
a mill in the central Sierras, California. 
Total | Amount 
Original grade and Ton Er rag aa te Value 
eth of time in pile. contents | lowered 
thickness. pile. |ingrade.| 10S- 
| 
| Feet b.10.| Feet b. m. 
1, 2, and 3 clear—8/4....) Aug. 5, 1914, to Oct. 14, 1914...........------...... | 10, 244 2, 086 $3. 71 
(ovaud 2 clean 6/4944 July a4 1914) tovOct 14, 1914 hea Bee yal 75 AB 
No. 1 shop—6/4.........| May 31) 1914, TORO. CUES MLO A ete ope eine Rate i eta. 5, 334 51 10 
No. 1 shop—6/4......-.- May 1, 1914, CONC NOHA A, Ue See Oe eae ay 4, 582 yfalaiibe Pea 
No. 1 shop—8/4.........| Aug. 30, 1914, ‘pet? IOMIGIA ee SNE | 27,606 810 30 
Mol Qshop Gale Aue ily 241919. to Jume ig doit) | 4,842 260 42 
No. 2 shop—6/4.........] Oct. 30, 1913, to Oct. resi See hy eae a, 16, 585 207 .10 
INO )2ishop—O/auacons-. 0) Avpr. 28, 1914; to Oct, 1/1914 Beat vessel! | G, 783 digo be pels eos See 
The summer depreciation at this mill in connection with air 
seasoning of sugar pine appears to be about $1.90 per 1,000 feet for 
Nos. 1, 2, and 3 clear, 15 cents for No. 1 shop, and 12 cents for No. 2 
shop. In addition to this, it is estimated that about 1 per cent of the 
material depreciates one grade during the winter. 
Upon the basis of this study, the following suggestions are offered 
for decreasing loss through depreciation in grade during air seasoning. 
(1) Cut thick stock (8/4 and thicker No. 2 shop and better) early 
in the season so as to allow time for drying. 
(2) Clear away vegetation around piles. | 
(3) Keep rear pile foundations far enough off ground to allow of 
eood air circulation. 
(4) Provide a roof with 4-foot extensions front and rear for piles 
of high-grade pine left in yard over winter. 
(5) Provide sun covers during summer for piles of high-crade 
material. 
(6) Provide shed capacity for as much dry lumber a 
be held over winter. 
possible to 
(OD) 
