202 Scientific Intelligence. 
7. From Dr. John Frost, Lecturer at St. Thomas’ Hospital, &c. 
&c.—His Oration delivered before the Medico Botanical Society of 
London, by Dr. F. 
8. From W. H. Fitton, M.D. F.R.S. P. G. Soc.—His anni- 
versary Address at the meeting of the Geological Society of London. 
9. Three Lectures on the transmission of the precious metals 
from country to country, and the mercantile theory of wealth, deliv- 
ered before the university of Oxford, by N. W. Senior, late Fellow 
of Magdalen College, and Professor of Political Economy. 
10. Proceedings of the Phil. and Lit. Soc. of Bristol, England, 
at their sixth annual meeting. ' 
11. Catalogues and Circulars of the collection of minerals and 
rocks, for sale and exchange at the Mineral Comptoir, at Heidelberg, 
Germany. 
‘15. Gifts to the Geological Society, by Dr. Jacob Porter —Two 
boxes of minerals. 
Secret History of the Court and Cabinet of Saint Cloud. 
Report on a Canal (or Canals,) from Boston to Connecticut and 
Hudson Rivers. 
Report on a Rail Road from Providence to Boston. 
_ Report on a Rail Road from Boston to Albany. 
16. Gold in Maryland.—A letter just received from a corres- 
pondent in Baltimore, informs us that gold has been recently found 
in Maryland. It is known to exist in Virginia, and these localities, 
with those of North Carolina, appear to form a straight line parallel 
or nearly so, it is believed, with the Alleghany range. Quartz is 
abundant in the region about that discovered in Maryland, as is the 
case also in that of North Carolina. 
17. Culture of Silk.—Dr. Felix Pascalis, has published ‘ Prac- 
tical Instructions for the culture of Silk and the Mulberry Tree,” 
Vol. I.; to which is added, “The Natural History of the Silk Worm.” 
This work abounds with valuable and pleasing information, and can- 
_ hot fail to arrest the attention of all who are interested in the impor- 
tant manufacture to which it refers. 
The 2d volume of the Practical Instructions is promised to appear 
in October, and with it the 2d No. of a quarterly periodical work, 
called the Silk Culturist, to be devoted, as its name implies, to the 
promotion of that branch of industry. 
