156 PROCEEDINGS OF THE AMERICAN ACADEMY 



Astronomical Observations made during the Year 1845 at the Na- 

 tional Observatory, Washington. Vol. I. 4to. Washington, 1846. 

 From the Observatory. 



Silliman's American Journal of Science. Vol. III., No. 7, for Jan., 

 1847. From the Editors. 



W. C. Redfield. On three several Hurricanes of the Atlantic, and 

 their Relations to the Northers of Mexico and Central America, vv^ith 

 Notices of other Storms. 8vo. pp.118. New Haven, 1846. From 

 the Author. 



Maj. James D. Graham. Observations on the Magnetic Dip at sev- 

 eral Positions, made in 1840, 1842, 1843, 1844, 1845. (Extr. from 

 American Philos. Trans.) 4to. pamph. Philadelphia, 1846. From 

 the Author. 



Dr. Barratt. Report on the Season of 1846, to the Middlesex 

 County Agricultural Society. 8vo. pp. 14. Middletown, Conn., 1846. 

 From the Author. 



Dr. Barratt. Geology of Middletown and Vicinity (Sentinel and 

 Witness extra). Middletown, Conn., July 30, 1846. From the Author. 



Dr. A. A. Gould. Expedition Shells. 8vo. pp. 25 - 32. Boston, 

 1846. From the Author. 



Prof. E. N. Horsford. Chemical Essays relating to Agriculture. 

 12mo. Boston, 1846. From the Author. 



Prof. E. N. Horsford. Untersuchungen iiber Glycocoll und einege 

 seiner Zerselzunzsproducte. 12mo. pp. 57. Giessen, 1846. 



W. C. Bond, W. C. Bond, Jr., and G. P. Bond. Occultations and 

 Eclipses observed at Dorchester and Cambridge, Mass. (Extr. Mem. 

 Amer. Acad.) 4to, pp. 8. 1846. From the Authors. 



Asa Gray. Chloris Boreali Americana. Illustrations of new, rare, 

 or otherwise interesting North American Plants. Decade I. 4to. 

 (Extr. Mem. Amer. Acad., Vol. III.) From the Author. 



Wm. S. SuUivant. Contributions to the Bryology and Hepaticology 

 of North America. Part I. 4to. (Extr. Mem. Amer. Acad. Vol. 

 III.) From the Author. 



Charles Holtzapffel. Turning and Mechanical Manipulation. 2 

 vols. 8vo. London, 1846. From the Author. 



Charles Holtzapffel. On a Scale of Geometrical Equivalents for 

 Engineering, &c. 8vo. pamph. London, 1838. From the Au- 

 thor. 



Charles Holtzapffel. A New System of Scales of equal Parts, ap- 



