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Account of the Northumberland Equatoreal and Dome, attached to 

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The African Repository and Colonial Journal. Vol. XXI. Septem- 

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The Medical News and Library. Vol. III. September, 1845. No. 

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Journal of the Franklin Institute of the State of Pennsylvania. Vol. 

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On the Liquefaction and Solidification of Bodies generally existing as 

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The Electrical Magazine. Conducted by Mr. Charles V. Walker. 

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On the Transport of Erratic Blocks. By William Hopkins, M.A., 

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Four Letters on the Motion of Glaciers. By William Hopkins, Esq., 

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Bulletin Polytechnique, Revue des Sciences Exactes, de leurs applica- 

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The American Journal of Science and Arts. Conducted by Prof. 

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Report of the Secretary of the Navy, communicating a Report of the 

 Plan and Construction of the Depot of Charts and Instruments, 

 with a Description of the Instruments, &c. February 18, 1845. 

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The Principles of the Differential and Integral Calculus; and their 



