[ 24 ] 
Presents. Donors. 
WILLIAMS (C. Wye) On Heat in its relations to' Water and Steam. 8vo. The Author. 
London 1861. 
— Elementary Treatise on the Combustion of Coal and the 
Prevention of Smoke. 8vo. London 1858. 
Prize Essay on the Prevention of the Smoke Nuisance. 
8vo. London 1857. 
WINNECKE (A,) Bemerkungen iiher den dritten Cometen von 1860. 8vo. Mons. 0. Struve. 
1860. 
ZESCEYICH (J.) Triedrometre. 8vo. Brest. Mons. Gamault, by Sir ' 
W. S. Harris, E.H.S. 
ZESCEYICH (J.) et GAENAULT (E.) Eegle rhumbee et Secteur dromo- 
seopique. 8vo. Brest. 
