xvi. | SPANISH OAK. 99 
The star-shake defect is common to it, and, taken 
altogether, it is of very inferior quality. The Spanish 
Oak did not meet with approval in either the royal or 
private ship-building yards, and consequently the ship- 
ments of it to this country have declined for some time 
past. It is remarkable that this Oak is of very slow 
growth (vide Table IL, p. 17); and perhaps this in some 
measure accounts for its inferior quality, our theory 
being that the trees of the same species which mature 
their wood most rapidly are generally the best of their 
kind. 
TABLE XXXVII.—SPANISH OAK. 
Transverse Experiments. 
Deflections. T tal Wei nt! : 
Number = - weight eS ieduced! Foss a 
oF the With the ! After the At — | required | “6-5 to te Meal 
. Ons apparatus| weight | the crisis | to break && | specific eal 
pecimen. | weighing was o each abo | gravity! * ce 
390 lbs. | removed. ! breaking. | piece. 1000. i seh 
Inches. Inch. | Inches. Ibs. : Ibs. 
I 4°25 25 6-00 626 1032 | 606; 15650 
; 2 3°50 “20 6715 616 1076 | 572 154°00 
i 3 3°65 ; "25 | 5°65 | 544 | 1030] 528! 136'00 
| 4 4°75 35 775 509 1066 | 477 | 127°25 
i 5 3°85 °25 8-00 578 1020 | 566 | 144°50 
6 4°15 "20 615 497 1028 | 483 | 124°25 
Total .| 24°15 | 1°50 | 39°70 | 3370 | 6252 | 3232 | 842°s0 
“Average 47025! *25 6°616 | 561°66, 1042 | 538°66) 140°416 
E = 239190. S = 1474. 
Remarks.—Each piece broke short ; in no instance was there more than 3 to 4 inches 
of fracture. 
There are, besides the Oaks already mentioned, 
several others which have not yet been brought 
sufficiently into use for their capabilities to be fairly 
tested ; and among these are the Oaks of Turkey. In 
