THE SUITABILITY OF AMERICAN WOODS FOR PAPER PULP 45 
Port Orford Cedar (Chamaecyparis lawsoniana) 
Other names in use. — Lawson's cypress, Oregon cedar, ginger pine, and white 
cedar. 
Range. — Pacific coast region from southwestern Oregon to northwestern Cali- 
fornia, extending inland about 40 miles. The bulk of the timber of commercial 
importance is confined to a strip 20 to 25 miles wide along the Pacific coast in 
Coos and Curry Counties, Oreg. 
Oven-dry weight per cubic foot, green volume. — 26 pounds. 
Fiber length. — 2.6 mm. 
By Sulphite Process 
Reduces fairly readily. 
Unbleached pulp: Strong, fine fibered; rather difficult to bleach. 
Yields: 45 to 55 per cent. 
Bleach required: 25 to 30 per cent. 
Uses to which pulp is suited: Wrapping papers and some print papers. 
By Sulphate Process 
Reduces readily. Best results obtained at cooking temperatures corresponding 
to steam pressures below 80 pounds per square inch. 
Unbleached pulp : Very strong, but strength easily impaired by too high tem- 
peratures during cooking. 
Yields: Not fully determined; possibly 40 to 45 per cent. 
Bleach required: 25 to 30 per cent. 
Uses to which pulp is suited: Kraft wrapping papers and fiber board. 
By Mechanical Process 
Probably unsuited to grinding because of color and nature of the wood. 
Southern White Cedar (Chamaecyparis thyoides) 
Other names in use. — White cedar, swamp cedar, post cedar, and juniper. 
Range. — Atlantic coast region from southern Maine to northern Florida west- 
ward to Mississippi (Pearl River). 
Oven-dry weight per cubic foot, green volume. — 20 pounds. 
Fiber length. — 2.1 mm. 
By Sulphite Process 
Pulping characteristics probably similar to those of Port Orford cedar. 
By Sulphate Process 
Reduces readily. Best results obtained at cooking temperatures corresponding 
to pressures below 80 pounds per square inch. • 
Unbleached pulp : Very strong, but strength easily impaired by too high tem- 
peratures during cooking. 
Yields: 45 to 50 per cent of strong pulp, 38 to 43 per cent of pulp for bleaching. 
Bleach required: 20 to 30 per cent. 
Uses to which pulp is suited: High-grade kraft wrapping papers and fiber 
board. 
By Mechanical Process 
Probably reduces readily to satisfactory pulps with reasonable power 
consumption. 
Eastern Red Cedar (Juniperus virginiana) 
Other names in use. — Cedar, juniper, and savin. Trade names for the wood 
are eastern red cedar and Tennessee red cedar. 
Range. — Nova Scotia and New Brunswick to Georgia (coast), southern Ala- 
bama and Mississippi; west in Ontario (Georgian Bay) to eastern North and 
South Dakota, southern Michigan, eastern Nebraska and Kansas, southeastern 
Oklahoma, southwestern Arkansas, and eastern Texas. 
Oven-dry weight per cubic foot, green volume. — 27 pounds. 
Fiber length. — 2.8 mm. 
