[ 7 J 
Presents. 
HALLASCHKA (C.) Sammlung der vom 8 May 1817 bis 31 Decem- 
ber 1827 im K. K. Convikt-Gebaude nachst dem Piaristen-Kolle- 
gium auf der Neustadt Prag Nro. C. 856, angestellten astronomis- 
chen, meteorologischen und physischen Beobachtungen. 4to. Prag. 
HAMILTON (H. P.) An Analytical System of Conic Sections. Se- 
cond Edition. 8vo. Cambr. 1830. 
HAMILTON (W. R.) Supplement to an Essay on the Theory of 
Systems of Rays. 4to. Dublin 1830. 
— Second Supplement to an Essay on the Theory 
of Systems of Rays. 4to. Dublin 1830. 
On the Error of a received Principle of Analysis, 
respecting Functions which vanish with their Variables. 4to. Dublin. 
HARDING (K. L.) Verzeichniss der von Bradley, Piazzi, Lalande, 
und Bessel beobachteten Sterne, in dem Theil des Himmels zwis- 
chen 14 h 56' bis 16 h 4' gerader Aufsteigung, und 15° siidlicher 
bis 15° nordlicher Abweichung, berechnet und auf 1800reducirt von 
Herrn Prof. Harding in Gottingen. Fol. Berlin 1830. 
HARDWICKE (T.) A Lithographic Portrait of Major-General Hard- 
wicke, F.R.S. From the painting by Lucas. 
HARRIS (W. S.) Experimental Inquiries on Electrical Accumula- 
tion. 8 vo. 
On the Utility of fixing Lightning Conductors in 
Ships. 8vo. 
HART (J.) Description of the Skeleton of the Fossil Deer of Ireland, 
Cervus Megaceros. Second edition. 8vo. Dublin 1830. 
HASSLER (F. R.) Tabulae Logarithmicae et Trigonometricae, notis 
septem decimalibus expressse. In forma minima. Purgatae ab 
erroribus praecedentium Tabularum. Stereotypice. 12mo. Novi- 
Ebor. 1830. 
Introductions to Mr. Hassler’s Logarithms, in the 
English, French, German, and Spanish Languages. 8vo. New York 
1831. 
HEDGCOCK (T.) On Astronomy, the Magnet, Tides, &c. with 
engraved illustrations. 8vo. Bond. 1831. 
HENDERSON (T.) Occultations of Fixed Stars by the Moon, in 
November and December 1830, and for the Year 1831. 
HEURTELOUP {Baron). Cases of Lithotrity. 8vo. Bond. 1831. 
HOGG (J.) On the Natural History of the Vicinity of Stockton-on- 
Tees. 8vo. 
HOLLAND (G. C.) An Experimental Inquiry into the Laws which re- 
gulate the Phenomena of Organic and Animal Life. 8vo. Bond. 1829. 
The Physiology of the Foetus, Liver, and Spleen. 
8vo. Bond. 1831. 
HOLLAND (T.) The Herschelian, or Companion to the Telescope. 
Part. I. Fol. Bond. 1831. 
HOME (E.) A short Tract on the Formation of Tumours, and the 
Donors. 
The Author. 
The Author. 
The Author. 
The Royal Academy of 
Sciences, Berlin. 
John E. Gray, Esq. F.R.S. 
The Author. 
The Author. 
The Author. 
The Author. 
The Royal Astronomical 
Society. 
The Author. 
The Author. 
The Author. 
The Author. 
The Author. 
