mercial values of the two bracks vary both in the timber, and in the plank, in about the proportion of three to two.
In civil architecture, the Dantzic Oak may be used with advantage for a great variety of purposes, as it stands well, shrinks only moderately, and without splitting much in seasoning.
The Navy contracts for Dantzic Oak do not include square timber, but thick-stuff of 7 to ½ inches, and plank of 4 to 2 inches only, which are received under the following specification:—
The Dantzic Oak thick-stuff and plank to meet at 32 feet, and none to be shorter than 24 feet; and to be from 10 to 13 inches broad, averaging 11 inches clear of sap. The whole to be fresh, clean, free from defective wanes, cut regular, square-edged, and straight; the breadth for measurement to be taken clear of sap at the middle of the length; 67 per cent, of each thickness to be of first or crown quality, and the remainder of second or crown brack quality.
Tables XXXII. and XXXIII. show that the Dantzic Oak, when tested transversely, or tensilely, is of moderate strength; and, according to Table XXXIV., when tested for the vertical or crushing strain, it proves to be strong, and compares favourably with the British Oak.
