[ 12 ] 
Presents. 
PICKETT (VV. V.) New System of Architecture adapted to the Properties of 
Iron and other Metals. A Sheet. 
PILLA (L.) Istoria del Tremuoto che desolo la Costa Toscana il II Agosto 
ISI'G. 8 VO. Pisa 1846. 
PLANTAMOUR (E.) Resume Meteorologique des Dernieres Annees, pour 
Geneve et le Grand St. Bernard. 8vo. 
Memoire sur la Comete Mauvais de I’Annee 1844. 
4to. Geneve 1847. 
Observations Astronomiques faites a I’Observatoire de 
Geneve dans I’Annee 1845. 4to. Geneve 1848. 
PLAYFAIR (L.) and DE LA BECHE (Sir H.) First Report on the Coals 
suited to the Steam Navy. fol. London 1848. 
PORTRAITS. 
Portrait of Alexander von Humboldt, lithograph. 
Portrait of A. Quetelet. 
Portrait of Sir John Franklin, Capt. R.N., F.R.S., lithograph, 1848. 
POURRET (P. A.) Noticia Historica de la Familia Salvador de Barcelona. 
4to. Barcelona 1844. 
QUETELET (A.) Sur les Anciens Recensementsde la Population Beige. 4to. 
Rapport sur I’Essai du Recensement General fait a Molen- 
beek St. Jean. 4to. Bruxelles 1846. 
De rinfluence du Libre Arbitre de I’Homme sur les Faits 
Sociaux. 4to. Bruxelles. 
Observations des Phenomenes Periodiques. 
Annales de I’Observatoire Royal de Bruxelles. Tome V. 
4to. Bruxelles 1846. 
Annuaire de I’Observatoire Royal de Bruxelles, 1847. 
12mo. Bruxelles 1846. 
RAGONA-SCINA (D.) Sulle Righe Trasversali e Longitudinal! del Spettro 
Luminoso. 
REGNAULT (V.) Relation des Experiences pour determiner les principales 
lois physiques, et les donnees numeriques qui entrent dans le Calcul des 
Machines a Vapeur. With Atlas. Premiere Partie. 4to. Paris 1847. 
RENNIE (Sir J.) An Historical, Practical and Theoretical Account of the 
Breakwater in Plymouth Sound, fol. London 1848. 
REPORTS. 
Report of the United States Coast Survey, by A. D. Bache, 1847. 
Report on the Climate and Principal Diseases of the African Station, drawn 
up under the direction of Sir William Burnett, M.D., by Alexander Bryson, 
M.D. 8 VO. London 1847. 
Reports on various Professional Subjects connected with the duties of the 
Corps of Engineers, Madras Presidency. 2 vols. 4to. Madras 1839. 
RICHARDSON (J.) Touarick Alphabet, fol. London. 
Translations and Vocabulary of the Berber Ghadamse 
Languages, fol. London 1847. 
RITTER (C.) Die Geographische Verbreitung einiger Characteristischen 
Arabischen Producte. 8vo. 
Donors. 
The Author. 
The Author. 
The Author. 
The Authors. 
Lieut.-Col. Sabine, R.A., 
For. Sec. R.S. 
M. Quetelet. 
C. R. Weld. 
The Author. 
The Author. 
The Observatory. 
The Author. 
The Author. 
The Author. 
The United States Govern- 
ment. 
Sir William Burnett, F.R.S. 
Major J. T. Smith. 
The Author. 
The Author. 
The Author. 
