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D. VAN NO STRAND. 47 
10. 
COMPOUND ENGINES. Trauslated from the French of 
A. Mallet. Illustrated. 
11. 
THEOEY OF ARCHES. By Prof. W. Allah, of the 
Washington and Lee College. Illustrated. 
12. 
A PRACTICAL THEORY OF YOUSSOIR ARCHES. By 
William Caim, C.E. Illustrated. 
13. 
A PRACTICAL TREATISE ON THE GASES MET 
WITH IN COAL-MINES. By the late J. J. Atkixsox, 
Government Inspector of Mines for the County of Durhain, 
England. 
FRICTTON OF AIR IN MINES. By J. J. Atkinsos. 
Autlior of “A Practical Treatise on the Gases met with in 
Coal-Mines.” 
15. 
SKEW ARCHES. By Prof. E. IV. Hyde, C.E. Illustrated 
with numerous engravings and three folded plates. 
i