Galloway. First Steps in Chemistry. 12mo, cloth. $1.75. London. 1856. Ganot. Traité Elémentaire de Physique Experimentale et Appliquée et de Météorologie. In-12°, avec 558 figures dans le texte. Half-calf. $2.50. Paris. 1857.

Garnier. Leçons de Calcul Différentiel. In-8°, half-calf. $1.25. Paris.

1811.

Gauss. Méthode des Moindres Carrés. In-8°, half-calf. $1.75. Paris. 1855.

Gautier. Traité des Ponts. In-8°, half-morocco. $3.50. Paris. 1745. Gavarret. Traité d'Electricité. 2 vol. in-18°, avec 448 figures dans le texte. Half-calf. $5.50. Paris. 1857-8.

Gayffier. Manuel des Ponts et Chaussées. 2 vol. in-8°, half-calf. $3.00. Paris. 1850.

Gregory. Examples of the Processes of the Differential and Integral Calculus. 8vo, cloth. $5.00. (Second-hand, 1841, $4.00.) London. 1846. Gregory and Walton. Application of Analysis to Solid Geometry. 8vo, half-cloth. $4.00. Cambridge. 1852.

Gerhardt et Chancel. Précis d'Analyse Qualitative. In-12°, halfcalf. $2.25. Paris. 1855.

Gervais et Berneden. Zoologie Médicale. Exposé Méthodique du Règne Animal. 2 vol. in-8°, half-morocco. $5.00. Paris. 1859. Giroud and Lesbros. Tables des Sinus Naturels, pour la levée des Plans de Mines et pour faciliter quelques Opérations de Trigonométrie, calculées jusqu'à 100 mètres. In-8°, half-calf. $2.25. Paris. 1829.

Gmelin. Hand-Book of Chemistry. Vols. 2 to 12 inclusive. 8vo, cloth. $7.00 per vol. London. 1847-1858.

Godfrey. Elementary Treatise on the Lunar Theory. 8vo, cloth. Second-hand. $1.25. Cambridge. 1853.

Goodwin. Elementary Course of Mathematics. 8vo, cloth. $4.50. Cambridge. 1857.

Gordon. The Pinetum; a Synopsis of all the Coniferous Plants at present known. 8vo, cloth. $4.75. London. 1858.

Graeff. Mémoire sur l'Appareil et la Construction des Ponts Biais. In8°, half-calf. $2.25. Paris. 1853.

Grant. History of Physical Astronomy. 8vo, cloth. $2.00. London. N.D. Grant. Plane Astronomy. Pt. I. 8vo, cloth. London. 1850.

Griffin. The Radical Theory in Chemistry. 12mo, cloth. $3.75. London. 1858.

Griffith and Henfrey. Micrographic Dictionary. A Guide to the Examination and Investigation of the Structure and Nature of Microscopic

Objects. With 45 Plates and 812 Wood-Cuts. 8vo, cloth. $13.50. London. 1860.

Grove. On the Correlation of the Physical Forces. 8vo, cloth. $2.25. London. 1855.

Guiot. Eléments de Perspective Linéaire. In-8°, avec Atlas grand in-4o, de 37 Planches. Half-morocco. $5.50. Paris. 1847.

Hamilton. Lectures on Quaternions. 8vo, cloth. $6.50. London.

1853.

Hancock. Origin and Progress of the Caoutchouc India-Rubber Manufacture in England. 8vo, cloth. $3.00. London. 1837.

Hanley. Shells of Linnæus. With an Exact Reprint of the Vermes Testacea of the Systema Naturæ and Mantissa. 8vo, cloth. $8.50. London.

1855.

Hann. Theoretical and Practical Mechanics. 8vo, cloth. $3.00. London. Harant et Laffitte. Leçons de Mécanique Elémentaire, avec 195 figures intercalées dans le Texte. In-8°, half-calf. $2.25. Paris. 1858. Harris. On the Nature of Thunder-Storms, and the Means of Protecting Buildings and Shipping against the Destructive Effects of Lightning. 8vo, cloth. $3.25. London. 1843.

Harvey. Manual of the British Algæ. 8vo, cloth. $3.00. London.

1841.

Hassall. Food and its Adulterations. 8vo, cloth. $8.50. London. 1855. Hassall. Adulterations of Food Detected; or, Plain Instructions for the Discovery of Frauds in Food and Medicine. 12mo, cloth. $5.50. London. 1857.

Hart. Treatise on the Construction of Oblique Arches. With 11 Plates. Royal 8vo, cloth. $2.50. London. 1848.

Haton de la Goupillère. Eléments du Calcul Infinitésimal. In-8°. $1.75. Paris. 1860.

Haupt. General Theory of Bridge Construction. 8vo, cloth. $3.00. New York. 1846.

Heiser. Traité de Gymnastique Raisonnée. In-8°, half-calf. $2.50. Paris. 1854.

Hemming. Elementary Treatise on the Differential and Integral Calculus. 8vo, cloth. $3.00. London. 1852.

Herschel. Outlines of Astronomy. Sixth Edition. 8vo, cloth. (1849. $4.00.) $5.50. London. 1859.

Herschel. Physical Geography. 12mo, cloth. $2.25. Edinburgh. 1861. Hirsch. Collection of Examples, Formulæ, and Calculations on the Literal Calculus, and Algebra. 2 vols. 8vo, bds. Rare. $3.00. London. 1827.

Hirschfeld et Léveillé. Névrologie, ou Description et Iconographie du Systéme Nerveux et des Organes des Sens de l'Homme avec leur Mode de Préparation. Acompagné de 92 Planches coloriées et dessinées d'après Nature. Grand in-8°, half-morocco. $25.00. With plates uncolored, 2 vols. half morocco, $15.00. Paris. 1853. Hoblyn. Dictionary of Scientific Terms.

Hogg. The Microscope. Its History, &c.

1859.

12mo, cloth. $1.00. 1850. 12mo, cloth. $1.50. London.

Hopkins. On Winds and Storms. 8vo, cloth. $2.25. London. 1860. Hopkinson. The Steam-Engine explained by the Use of the Indicator. 8vo, plates. $3.25. London. 1860.

Houel, J.

Tables de Logarithms a Cinq Décimals. In-8°, half-calf. $1.00. Paris. 1858.

Hunt. Manual of Topography. 12mo, cloth. $1.00. London. 1854. Hunter. Essays and Observations on Natural History, Anatomy, Physiol-. ogy, and Geology. 2 vols. 8vo, cloth. $9.50. London. 1861.

Hutton. Recreations in Science and Natural Philosophy. Edited by Riddle. 8vo, cloth. $4.00. London. 1854.

Hymers. Analytic Geometry of Three Dimensions. 8vo, boards. $3.50. London. 1848.

Hymers. Conic Sections. Third Edition. 8vo, boards. $3.00. London. 1845.

Hymers. Differential Equations and Calculus of Finite Differences. 8vo, cloth. $4.00. London. 1858.

Hymers. Integral Calculus. 8vo, boards. $3.50. London. 1844. Hymers. Plane and Spherical Trigonometry and Trigonometric Tables and Logarithms. Fourth Edition. 8vo, cloth. $2.87. London. 1858. Hymers. Algebraical Equations. 8vo, cloth. $3.50. London. 1858. Hymers. Elements of Astronomy. 8vo, boards. $4.75. London. 1840. Jacoby. Traité de Calcul Mental. In-12°. $1.25. Paris. 1860. Jacquet. Tracé Général des Courbes. In-8°, half-calf. $2.00. Paris.

1858.

James. History of the Worsted Manufactures in England. 8vo, cloth. $7.50. London. 1857.

Jamieson. Mechanics for Practical Men. 8vo, cloth. $1.00. London.

1845.

Jamieson. Solution of Senate-House Riders. 8vo, cloth. $2.50. London. 1851.

Jariez. Cours Elémentaire de Mécanique Industrielle. 2 vols. in-8°, halfmorocco. $5.50. Paris. 1847.

Jariez. Cours de Géométrie Descriptive et ses Applications au Dessin des Machines. In-8°, half-calf. $2.00. Aix. 1846.

Jellet. The Calculus of Variations. 8vo, cloth. $5.00. Scarce. Dublin. 1850.

Johnston. History of the British Zoöphytes. 2 vols. 8vo, cloth. $13.50. London. 1847.

Johnstone and Croatt.

8vo, cloth. $ 50.00. London.

Nature-Printed British Sea-Weeds. 4 vols. 1859-1861.

Jukes. Student's Manual of Geology. 8vo, cloth. $2.50. Edinburgh. 1857.

Jullien et Lorentz. Manual de l'Ingénieur Civile. 2 vol. in-8°, avec Atlas de 28 Planches. Half-calf. $4.00. Paris. 1845.

Kentish. Treatise on a Box of Instruments and the Slide-Ruie. 16mo, cloth. $1.00. Philadelphia. 1852.

Kelland. Algebra, a Complete Introduction to Analytical Science. 12mo, cloth. $2.25. Edinburgh. 1861.

Knox. Man; His Structure and Physiology. 12mo, cloth. $2.25. Lon

don. 1858.

Kohler. Logarithmish-Trigonometrisches Handbuch. 8vo, half-morocco. $2.12. Leipsic. 1855.

Kolliker. Manual of Human Histiology. 2 vols. 8vo, cloth. $4.00. London. 1843.

Kölliker. Eléments d'Histologie Humaine.

Grand in-8°, avec 334 Fig

ures dans le Texte. Half-morocco. $5.00. Paris. 1856. Labosne et Maréchai. Cours Complet de Mathématiques. In-12o, half-calf. $1.25. Paris. 1855.

Lacroix. Traité Elémentaire de Calcul Différentiel et Intégral. 2 vol. in-8°. $4.00. Paris. 1861.

Lacroix. Traité Elémentaire de Trigonométrie Rectiligne et Sphérique. In-8°, half-calf. $1.75. Paris. 1852.

Lacroix. Traité du Calcul Différentiel et du Calcul Intégral. 2o édition. 3 vol. in-4°, avec 18 Planches. Epuisé, rare. Half-calf, $ 28.00; morocco, $35.00. Paris. 1810.

Lagrange. Théorie des Fonctions Analytiques. In-4°. $3.00. Paris.

1813.

Lagrange. Traité de la Résolution des Equations Numériques de tous les Degrés. In-4°. $4.00. Paris. 1808.

Lagrange. Mécanique Analytique. Revue, Corrigée et Annotée par J. M. Bertrand. 2 vol. in one. In-4°, half-morocco. $12.00. Paris. 1843. Laisné. Gymnastique Pratique. In-8°, half-calf. $3.25. Paris. 1850.

La Lande. Tables de Logarithmes. Etendues à Sept Décimals. In-12o, + half-calf. $1.50. Paris. 1858.

Lallemande. Des Pertes Seminales Involontaires. 4 vol. in-8°. $3.00. Paris. 1836.

Lamé. Leçons sur les Coordonnées Curvilignes et leurs diverses Applications. In-8°, half-calf. $2.25. Paris. 1859.

Lamé. Leçons sur les Fonctions Inverses des Transcendantes et les Surfaces Isothermes. In-8°, half-calf. $2.00. Paris. 1857.

Laplace. Théorie Analytique des Probabilités. In-4°, avec quatre Supplements. Half-morocco. $12.00. Epuise, rare. Paris. 1820. Laplace. Essai Philosophique sur les Probabilités.

half-calf. $2.25. Paris. 1840.

6° édition, in-8°,

Laplace. The System of the World. Translated by J. Pond. 2 vols. 12mo, calf. $ 2.00. Second-hand. London. 1809.

Laplace. Elementary Illustrations of the Celestial Mechanics. 8vo, cloth. $1.50. Second-hand. London. 1832.

Lardner. Hand-Book of Natural Philosophy. 4 vols. 12mo, cloth. $6.00. London. 1858.

Lardner. Popular Essays on Scientific Subjects. 12mo, cloth. $2.00. London. 1852.

Lardner. The Museum of Science and Art. 4 vols. 12mo, cloth. London. 1859.

Lardner. Differential and Integral Calculus. 8vo, cloth. $2.50. London. 1825.

Lardner. First Six Books of the Elements of Euclid. $1.25. London. 1850.

8vo, boards.

Latham. Construction of Wrought-Iron Bridges. 8vo, cloth. $5.00. London. 1858.

Laurent. Précis de Cristallographie. In-12°, half-calf. $1.00. Paris. 1847.

Laurent. Méthode de Chimie, précédée d'un Avis au Lecture par M. Biot. In-8°, half-calf. $3.00. Paris. 1854.

Leclerc. Traité de Drainage, ou Essai Théorique et Pratique sur l'Assainissement des Terres Humides. In-8°, half-calf. $3.00. Paris.

Lefébure de Fourcy. Leçons de Géométrie Analytique. In-8°. $2.25. Paris. 1859.

Legendre. Théorie des Fonctions Elliptiques. 3 vols. in-4°, half-morocco. $25.00. Rare. Paris. 1825.

Lehmann. Lehre der Situation-Zeichnung. 8vo, boards, with Atlas in 4to. $3.00. Leipzig. 1856.

Lehmann. Précis de Chimie Physiologique Animale. In-18°, half-calf. $2.00. Paris. 1855.