Rowley Regis, | Blue vitrified |} 2.85, 8.75 × 4.20 | 385.6 | 722.7 Staffs. | no recess |} | | | | | | Leicester | Red, recessed |} 2.65, 8.90 × 4.25}| 105.9 | 150.6 | both sides |} 2.75, 9.10 × 4.36}| | | | | | Napton-on-the-Hill,| Light brown, |} 2.85, 8.92 × 4.20}| 131.6 | 303.9 Rugby | wire cut |} 2.90, 9.10 × 4.25}| | | | | | Ruabon | Red, no |} 3.10, 8.75 × 4.28}| 439.2 | 676.8 | recess |} 3.15, 8.73 × 4.29}| | | | | | „ | Blue, no |} 3.02, 8.99 × 4.37}| 358.9 | 561.2 | recess |} 3.01, 8.95 × 4.36}| | | | | | Glogue, Whitland, | Slate débris | 2.33, 8.70 × 4.25 | 556.4 | 1056.2 S. Wales | | | | | | | | Ravenhead, St. | Red, brown |} 2.90, 9.00 × 4.20}| 215.8 | 354.7 Helens, Lancs. | wire cut |} 2.90, 8.90 × 4.27}| | | | | | Earith, St. Ives, | Yellow, wire |} 2.50, 8.70 × 4.10}| 135.9 | 178.8 Hunts. | cut |} 2.50, 8.80 × 4.20}| | | | | | Gillingham, Dorset | Red, wire cut |} 2.60, 8.90 × 4.30}| 159.5 | 261.7 | |} 2.60, 8.90 × 4.25}| | | | | | Newton Abbot, | Vitrified |} 2.80, 8.90 × 4.35}| -- | 445.2 Devon | “granite” |} 2.80, 9.10 × 4.55}| | -------------------+----------------+--------------------+---------+-------- Table III. is by Professor Unwin,[18] and records the strength of several well-known bricks. Professor Unwin’s mode of experimenting we have already alluded to. STRENGTH OF BRICKS.--III.