TO CORRESPONDENTS. 



Communications have been received from Mr. E. Forbes and Mr. Good- 

 sir, and from Mr. C. C. Babington, which, together with those of Mr. 

 Dickie, Dr. Lankester, Mr. Denny, and Mr. Thompson, we hope to 

 give in our next Number. 



THE GUIANA EXHIBITION FOR SALE BY AUCTION. 



MESSRS. J. C. & S. STEVENS have been favoured with Instructions to 

 SELL by AUCTION, at the Cosmorama, Regent Street, on Wednesday, 

 3st.!uly, and following day, the OBJECTS OF NATURAL HISTORY AND 

 CURIOSITY forming the above attractive Exhibition, collected by M. Schom- 

 burgk during his Travels in British Guiana. 



Catalogues will be ready one week prior to the Sale, and may be had at the 

 Cosmorama, and of Messrs. J. C. and S. Stevens, 38, King Street, Covent Garden. 



PLANTS JAVANICiE RARIORES ; containing Descriptions and 

 Illustrations of some of the PLANTS DISCOVERED IN JAVA. 



By THOMAS HORSFIELD, M.D. 



The Descriptions have been prepared chiefly by John J. Bennett, Esq. ; Re- 

 marks on the Structure and Affinities of most of the Subjects have been added by 

 Robert Brown, Esq. 



Part II., Imp. 4to, sewed, price 1/. 10s., or coloured 21. 10s. 



London : Wm. Allen and Co., 7, Leadenhall Street ; of whom may be had 

 Part II., price 21. 10s., or coloured 3/. 10s. 



SCIENTIFIC MEMOIRS; translated from Foreign Transaction* 

 and Journals. Edited by RICHARD TAYLOR, F.L.S. 



Part VI. with six Plates, price 6s. 



Containing — Melloni on the Polarization of Heat. — Gauss's General Theory of 

 Terrestrial Magnetism. — Gauss on a new Instrument for observing the Intensity 

 of Terrestrial Magnetism. — Weber on the use of the Bifilar Magnetometer. — 

 Schleiden on Phytogenesis. 



Part VII. of the Scientific Memoirs will be ready for delivery on 



the 17 th of June. 



In 1 vol. 8vo, with Eight folding Plates, price 18s. cloth, 



FARADAY'S EXPERIMENTAL RESEARCHES IN ELEC- 

 TRICITY. Being the Fourteen Series, from 1831, with Corrections and 

 Notes by the Author. 



Just Published, in 8vo, price 6s. 



A REPORT on the PROGRESS of VEGETABLE PHYSIOLOGY 

 during the Year 1837. 



By Dr. F. J. F. MEYEN, Professor of Botany in the University of Berlin. 



Translated from the German by William Francis, Associate Linn. Soc. 



%* The object of this Report is to give the substance of all the important Works 

 and Memoirs on this interesting branch of Botanical Science. 



R. and J. E. Taylor, Red Lion Court, Fleet Street. 



