Analysis of Periodical Works on Natural History. 65 



tion of Birds. By the late Edward Jenner, M.D. F.R.S. 

 — On the Nature of the acid and saline Matters usually ex- 

 isting in the Stomachs of Animals. By William Prout, M.D. 

 F.R.S. — On the North Polar Distances of the principal Fixed 

 Stars. By John Brinkley, D.D. F.R S. &c. Andrew's Pro- 

 fessor of Astronomy in the University of Dublin. — On the 

 Figure requisite to maintain the Equilibrium of a homogeneous 

 Fluid Mass that revolves upon an Axis. By James Ivory, 

 A.M. F.R.S. — On the Corrosion of Copper Sheeting by Sea- 

 water, and on Methods of preventing this Effect ; and on their 

 Application to Ships of War and other Ships. By Sir Hum- 

 phry Davy, Bart. Pres. R.S. — A finite and exact Expression 

 for the Refraction of an Atmosphere nearly resembling that 

 of the Earth. By Thomas Young, M.D. For. Sec. R.S.— 

 The Bakerian Lecture. On certain Motions produced in 

 Fluid Conductors when transmitting the Electric Current. By 

 J. F. W. Herschel, Esq. F.R.S. — Experiments and Obser- 

 vations on the Development of Magnetical Properties in Steel 

 and lion by Percussion : Part II. By William Scoresby, 

 Jun. F.R.S. E. &c. Communicated by Sir Humphry Davy, 

 Bart. Pres. R.S. — On Semi-decussation of the Optic Nerves. 

 By William Hyde Wollaston, M.D. V.P.R.S. 



Recently published. 

 Observations on the Re-building of London Bridge : de- 

 monstrating the Practicability of executing that Work in three 

 flat elliptical Arches of Stone, each two hundred and thirty 

 feet Span : with an Examination of the Arch of Equilibrium 

 proposed by the late Dr. Flutton : and an Investigation of a 

 new Method for forming an Arch of that Description. Il- 

 lustrated by Seven Plates and other Figures. By John Sea- 

 ward, Civil Engineer. 



The Green -house Companion: comprising a general 

 Course of Green-house and Conservatory Practice through- 

 out the Year; a natural Arrangement of all the Green-House 

 Plants in Cultivation ; with a descriptive Catalogue of the most 

 desirable to form a Collection, their proper Soils, Modes of 

 Propagation, Management, and References to Botanical Works 

 in which they are figured. Also, the proper Treatment of 

 Flowers in Rooms, and Bulbs in Water Glasses. 



ANALYSIS OK PERIODICAL WORKS ON NATURAL HISTORY. 



Curtis's British Entomology. 



No. 7. contains the following subjects : 



PI. 27. Aphoditu villottti. From an unique specimen taken by the author 

 upon Newmarket 1 Icatli. With the insect is figured the beautiful and local 



Anemone 



