TO CORRESPONDENTS. 



Mr. Ha worth's Account of the Acute-leaved Section of the Genus 

 Sedum is received, and will appear in our next. 



Mr. Mooiie's Description of a Machine for Calculating has been re- 

 ceived. 



NAVAL ARCHITECTURE. 



This day is published, in small Folio, with a large Atlas of 19 Plates, 

 price 4^. 4s., or neatly half-bound 5l. 5s. 



NAVAL ARCHITECTURE, or the RUDIMENTS and RULES of 

 SHIP-BUILDING, exemplified in a Series of Draughts and Plans, 

 with (.)b>ervations tending to the further Improvement of that important 

 Art. Dedicated, by permission, to His Majesty. By Marmaduke 

 Stalkartt. The Third Edition. 



Published by Josiah Taylor, Architectural Library, London. 



PHARMACOPOEIA LONDINENSIS, 



Iterum recognita et retractata, 1824, p. 6. 



« A CID UM A CETIC UM FOR TIUS" 



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. LV. A Plate exhibiting a Sketch of the Comet's Path of July 1819. 



A Plate illustrative of the Annular Eclipse of the Sun on the 7th of 



September next. — A Plate illustrative of Mr. Lane's Instrument for 

 gathering Fruit; Mr. Young's Mode of preparing Opium from the 

 Papaver somniferum; and of Captain Forman's Essay on a Property in 

 Light which hitherto has been unobserved by Philosophers. — A Plate de- 

 scriptive of Mr. Cuthbert's improved Hydro-pneumatic Apparatus, &c. 

 — A Plate Illustrative ofCapt. Forman's Essay on the Reflection, Refrac- 

 tion, and Inflection of Light, &c. ; and Mr. Charles Bonnvcastle's 

 Communication respecting the Influence of Masses of Iron on the Mari- 

 ner's Compass. 



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, 



Vol. LVII, A Plate illustrative of Mess. CErsted and Ampere's 

 Electro-magnetic Experiments, and Mr. Perkins's Paper on the C9ra- 

 pressibility of Water. — A Plate illustrative of Mr. Jamieson's Marine 

 Thermometer Case, and Mr. Jenning's Mercurial Log-Glass.— -A Plate 

 illustrative of Dr. Haiie's new Modification of Galvanic Apparatus. — A 

 Plate representing a Double Canal Lock, originally proposed for the Re- 

 gent's Canal, by Mr. 11. H. Gower; and a Modification of Electro-mag- 

 netic Apparatus, bv Mr.TATUM. 



