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XCIII. Notices respecting New Books. 



Recentlij published. 

 "plESCRIPTION of the Universal Telegraph, for Day and 

 ^-^ Night Signals. By C. W. Pasley, Lieut. Col. Royal En- 

 gineers and F.R.S. 



Descriptions of an EUectrical Telegi'aph, and of some other 

 Electrical Apparatus. By Francis Ronalds. 



M. Plana of Turin has just published an excellent memoir 

 on the theory of astronomical refraction ; in which, amongst 

 other things, he refutes the theory of Dr. Young, and points 

 out a singular mistake into which he has fallen, in his paper 

 inserted in vol. 58 of this Magazine. 



Preparing far Publication. 



Mr. J. F. Daniell, F.R.S., has in the press a volume of Me- 

 teorological Essays, embracing, among others, the following 

 important subjects : the Constitution of the Atmosphere ; the 

 Radiation of Heat in the Atmosphere ; Meteorological Instru- 

 ments ; the Climate of London ; the Construction and Uses of 

 a new Hygrometer. 



Mr. W. West of Leeds is about to publish in a separate 

 form, with additions, his Analysis of the New Sulphur Spring 

 at Harrowgate. 



ANALYSIS OF PERIODICAL WORKS ON BOTANY. 



Flora Londinensis. 



We are very happy to learn that arrangements have been made for se- 

 curing the regular continuance of that truly national work, the Flora 

 Londinensis. One Number of the neiu Edition of the Old Series (or that 

 which was edited by Mr. Curtis, but which had long been wholly out of 

 print); and one Number of the Continuation, or New Series, are hence- 

 forth to appear on the first day of each month, until the Old Series shall 

 be completed, which will take place in about nine months; when the Con- 

 tinuation alone will be regularly carried on as heretofore. 



During Mr. Curtis's lifetime it is well known that he had it in contem- 

 plation to make the Flora Londinensis, notwithstanding its title, include 

 all the plants of Great Britain; and he had already introduced some plants 

 whose habitats were far removed from the environs of the Metropolis. It 

 is the intention of the present Proprietors to carry this plan fully into effect ; 

 or should any thing, from peculiar circumstances, require to be omitted, it 

 will be among the more common and more minute of the Crj'ptogamic sub- 

 jects. As Dr. Hooker, Regius Professor of Botany in the University of Glas- 

 gow, who has so zealously and successfully studied theBotany of the British 

 Isles, has offered not only to edite the republication of the old series, but 

 also to supply all the materials, both of drawings and descriptions, for the 

 Continuation, the public will be secure that nothing will be wanting in all 

 that concerns correctness of description, fidelity in the figures, and the most 

 accurate and important dissections of the various parts of fructification ,- 

 and the colouring is superintended by Mr. Graves, whose great abilities in 

 his profession arc generally known. 



Of 



