. Wood; a manual of the natural history and industrial applications of the timbers of commerce. Wood; Timber. CONVERSION AND SEASONING 67 ancient Egyptian objects in the Britisk Mnseum must be several thousand years ; wood of Juniperus Oxycedrus buried in the island of Madeira has remained undecayed and fragrant for 400 years ; and Spruces 3 to 4 feet in diameter have been observed in the moist forests of North-West America growing on the prostrate but still sound trunks of TJiuya gigdntea. Speaking at the Surveyors' Institution in 1905, Mr. H. J. Elwes y^ â Ss. yf \>S^ /3' / Jf J t J ,.,,
. Wood; a manual of the natural history and industrial applications of the timbers of commerce. Wood; Timber. CONVERSION AND SEASONING 67 ancient Egyptian objects in the Britisk Mnseum must be several thousand years ; wood of Juniperus Oxycedrus buried in the island of Madeira has remained undecayed and fragrant for 400 years ; and Spruces 3 to 4 feet in diameter have been observed in the moist forests of North-West America growing on the prostrate but still sound trunks of TJiuya gigdntea. Speaking at the Surveyors' Institution in 1905, Mr. H. J. Elwes y^ â Ss. yf \>S^ /3' / Jf J t J ,.,, ,.r, **>, T",.? "2 \3 V S ^ ^ \ \ - t - JJ- â â _ â â ââ^^ â¢" , â -»- _ . \^4 ; â Sh Fig, 40. â A beam, showing structural aggregates. 1, centra-l or pith cone; 2, cyhnder of rings contmuous throughout; 3 and 4, partial cylinders, making "bastard faces " on the sides. (Modiiied from Roth.) said: " Last April he was in a house in Massachusetts which was built of White Oak in 1704, and had never paint or tar or preser- vative on it, and yet stood sound and water-tight to-day. He had hved in Switzerland in a house built of Larch logs which dated back more than 400 years. He had also Hved in a timber house in Norway said to be 160 years old, and still perfectly sound, although the much-despised Spruce was the timber ; Seasoning.!âBy girdling standing timber the process of season-. FiG. 41.~Plaiik well laid, with mside, or inner rings, downward. (After Laslett.) ing is to a great extent anticipated. Thus, in order to float the timber, which in its green state is at least as heavy as water, it is the general practice in Burmah to cut a complete ring through the ^ " There is probably no one to-day who does not believe that timber preservation in one form or another pays. Treated timber in almost every respect is cheaper in the long rmi than untreated timber; furthermore, the better treatments, although more expensive at
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Keywords: ., bookcentury1900, bookdecade1900, booksubjecttimb, booksubjectwood
