[ 15 ] 
Presents. 
■WARREN (Dr. J. C.) The Mastodon Giganteus of North America. 4to. 
Boston 1852. 
M ARREN (S.) The Intellectual and Moral Development of the Present Age. 
Second Edition. 8vo. London and Edinburgh 1853. 
WARTMANN (E.) Recherches sur la Conductibilite des Mineraux pour 
I’Electricite Voltaique. 4to. Geneva 1851. 
WEBER (W.) Elektrodynamische Maasbestimmungen insbesondere iiber 
Diamagnetismus. 4to. Leipzig 1852. 
W^EBSTER (T.) The New Patent Law ; its History, Objects and Provisions, 
&c. 8vo. London 1853. 
WOLF (Rudolph.) Neue Untersuchungen iiber die Periode der Sonnen- 
flecken und ihre Bedeutung. 8vo. Bern 1852. 
W ROTTESLEY (Lord.) Speech in the House of Lords on the 26th of April 
1853, on Lieut. Maury’s Plan for Improving Navigation, &c. 8vo. London 
1853. 
YOLLAND (Capt. W.) Astronomical Observations made with Airy’s Zenith 
Sector, from 1842 to 1850, for the Determination of the Latitudes of 
various Trigonometrical Stations used in the Ordnance Survey of the 
British Isles. 4to. London 1852. 
ZANTEDESCHI (F. C.) Ricerche Fisico-Matematiche sulla Deviazione del 
Pendolo dalla sua Trajettoria. 4to. Padova 1852. 
■ la Difference de Pouvoir dispersif des deux 
Electricites. 4to. Paris 1852. 
Nouvelles Experiences d’Electricite animale. 4to. 
Donors. 
The Author. 
The Author. 
The Author. 
The Royal Saxon Society 
of Sciences. 
The Author. 
The Author. 
The Author. 
The Author. 
The Board of Ordnance. 
The Author. 
Paris 1852. 
