60 TIMBER AND TIMBER TREES. [CHAP. 
The experiments on the vertical strength of British 
Oak are given in Tables XV. to XXII. inclusive. 
TABLE XV. 
Cubes of Unseasoned British Oak. Specific gravity, 966. 
Vertical or crushing experiments. 
Number z Inch, 2 Inches. 3 Inches. 4 Inches. 
of the 
specimen, j|Crushed with/Crushed with|Crushed with|Crushed with) 
Tons. Tons. Tons, Tons. 
49—52 2°750 7°000 20°000 33°750 
53—56 2°500 8000 19°375 31875 
57—60 2°000 9°500 20°125 33°125 
61—64. 2°500 8-500 19°625 32°875 
65—68 2250 8125 20°500. 337125 
69—72 2°375 9°250 20°125 33°500 
Total. .| 14°375 50°375 119°750 198°250 
Average . 2°396 8°396 | 19°958 33°041 
Do. perin. 2°396 2°099 2°217 2°064 
TABLE XVI. 
Cubes of Seasoned British Oak. Specific gravity, 740. 
Vertical or crushing experiments, 
Number z Inch. 2 Inches. 3 Inches. 4 Inches. 
of the 
specimen. (Crushed with|Crushed with|Crushed with|Crushed with 
Tons. Tons. Tons, Tons. 
73—76 3°750 13000 28°750 50°875 
77—80 37500 12°500 29°750 507125 
81—84 333 14°375 29°125 49°875 
3°625 14°000 28°500 50°625 
89—92 3°500 13°875 29°125 49°875 
93—96 3°625 14°25 28:'875 51125 
Total. .| 217375 81875 174°125 302°500 
Average . 37562 13°646 29 ‘021 50°417 
Do. per in. 3°562 3°411 3°225 3°151 
