TO CORRESPONDENTS. 



In our next Number we shall insert Mr. Sturgeon's Communication on Electro- 

 Magnetism, and the Continuation of Mr. Brayley's Paper respecting Meteors 

 and Meteorites. 



We shall have much pleasure in connhunicating Mr. Veall's Suggestion to the 

 Meteorological Society. 



Communications from Mr. Evans on Sir Isaac Newton's Binomial Theorem ; 

 Mr. Tatum on a Rain Gauge; Mr. Paul Newton on the Duplication of the 

 Cube ; and C on the Secular Change of the Obliquity of the Ecliptic, have been 

 received. 



We have hesitated respecting the insertion of Mr. Utting's Paper on an 

 Analogy which obtains between the Projectile and Gravitating Forces in the 

 Planetary System; as this analogy is an obvious result of Kepieb's Laws, and as" 

 we have incurred more expense in the printing of Astronomical Tables than we 

 can well bear. . . 



The subject of Mr. Doroden's Letter, for which we are much obliged to him, 

 engages at present our serious attention. 



We have received at a very late period of the month a Communication from 

 Mr. Samuel Seaward, on his Claim to the Invention of the Hydro-pneumatic 

 Pump figured and described by him in our present volume. We must refer this gen- 

 tleman to our repeatedly declared resolution not to suffer our pages to be occupied 

 by private controversies, or to be the vehicle of personal asperities, as our rea- 

 son for declining to insert his letter. All that we can be expected to state is, 

 that it contains a re-assertion that he is the inventor of the pump in question ; but 

 we should not wish to have our Journal made a medium for the discussion of pri- 

 vate claims of this kind, even if any evidence had been offered. 



PHARMACOPEIA LONDINENSIS, 



Iterum recognita et retractata, 1824, p. 6. 



"ACIDUM ACETICUM FORTIUS," 

 vel 



" Acidum Aceticum e Ligno destillatum." 



PURE CONCENTRATED ACETIC ACID, agreeable to the Sample 

 furnished at the request of the Committee of the Royal College of 

 Physicians, may be had of the Manufacturers, BEAUFOY & CO. South 

 Lambeth, London. 



ENGRAVINGS. 



Vol. LVI. A Plate illustrative of Mrs. Ibbetson's Paper On the Phy- 

 siology of Botany. — A Plate illustrative of Mr. Hall's Percussion Gun- 

 Lock; of Dr. Kitchiner's Pancratic Eye-Tube ; and of Mr. Park's 

 Mooring Blocks.— A Plate exhibiting Sections, &c. of Mr. Malam's im- 

 proved Gas- Meter.— A Plate exhibiting the Discoveries made by Capt. 

 Parry in the Polar Sea. 



