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Presents. 
BLANCHARD (Emile.) De I’Appareil Circulatoire et des organes de la respi- 
ration dans les Arachnides. 8vo. 
BOILEAU (M. P.) Jaugeage des Cours d’Eau. 8vo. Paris 1850. 
BOOTH (Rev. J.) The Theory of Elliptic Integrals, &c. &c. 8vo. London 
1851. 
BROUN (J. A.) Report of the Observations made in the Observatorj' at 
Makerstoun. 8vo. Edinburgh 1850. 
BULLOCK (Capt. F.) Model of the Mouth of the Thames. 8vo. 
Key to the Model of the Mouth of the Thames. 
BUSCH (A. L. von) Astronomische Beobachtungen auf der Kdniglichen 
Universitats-Sternwarte in Kdnigsberg. fol. Kbnigsberg 184'9. 
BUTLER (The Very Rev. G.) Harrow. A Selection of Lists of the School 
between 1770 and 1826. 8vo. Peterborough 184'9. 
CARPENTER (W. B.) Principles of Physiology, General and Comparative. 
Third Edition. Svo. London 1851. 
CH ALLIS (Rev. J.) Cambridge Observations. Vol. XVI. 4to. Cambridge 
1850. 
CHEVREUL (M.) Discours prononce ... la Societe Nationale et Centrale 
d’Agriculture. 8vo. 
Recherches Experimentales sur la Peinture a I’Huile. 4to. 
Paris 1850. 
Recherches Chimiques surplusieurs objets d’Archeologie, 
&c. 4to. Paris. 
Considerations sur la Reproduction, par les precedes de 
M. Niepce de Saint-Victor des Images gravees, dessinees ou imprimees. 
Rapport sur le Bouillon de la Compagnie Hollandaise. 
8vo. 
CHRISTOPHE (C. A.) L’Evangile Medical, ou Traite des Causes Premieres 
de THomme. 8ro. Paris 1843-45. 
CHRISTOPHERS (J.) Shipwreck and Collisions at Sea greatly prevented. 
8 VO. London 1850. 
CLARE (Peter.) An Account of some Thunder Storms and Extraordinary 
Electrical Phenomena that occurred in the neighbourhood of Manchester 
on Tuesday the 16th July, 1850. 
D’ARCHIAC (A.) Histoire des Progres de la Geologie de 1834 a 1849. 8vo. 
Paris 1850. 
DAUBENY (C. G. B.) An Introduction to the Atomic Theory. Second 
Edition. 8vo. Oxford 1850. 
DA\TS (Hewitt.) The Effects of the Importation of Wheat upon the Profits 
of Farming. Second Edition. Sva. London 1839. 
DAVY (Edmund.) An Essay on the Use of Peat or Turf as a means of pro- 
moting the Public Health, &c. 8vo. Dublin 1850. 
DE BOIS-GALLAIS (F. L.) Encore une Lettre inedite de Montaigne. 8vo. 
Londres 1850. 
DE LA BECHE (Sir H. T.) The Geological Observer. 8vo. London 
1851. 
DE MORGAN (A.) On the Symbols of Logic, the Theory of the Syllo- 
gism, and in particular of the Copula, &c. 
Donors. 
The Author. 
The Author. 
The Author. 
The Author. 
The Author. 
The Observatory. 
The Editor. 
The Author. 
The Syndicate of the Cam- 
bridge Observatory. 
The Author. 
The Author. 
The Author. 
The Author. 
The Author. 
The Author. 
The Autlior. 
The Author. 
M. Libri. 
The Author. 
The Author. 
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