Ti CONTENTS. 



MARCH, 1812. 

 Engravings of the following Subjects: 1. Figures to illustrate some Diseases of 

 Vegetables, delineated from Nature, by Mrs. A. Ibbetson. 2. Appearance 

 of Sugar in the Serum of blood ; by W. Hyde Wollaston, M. D. Sec. R. S. 

 3. A Compensation Pendulum, by Mr. Adam Reid. 4. A Noctuary, or Ap- 

 paratus for indicating the Hour in the Dark by Means of a common Watch, 

 by Mr. G. Spark. 



I. On the different Sorts of Wood, with some Remarks on the Work of Du 

 Thouars. In a Letter from Mrs. Agnes Ibbetson - - 161 



II. On the Action of Elastic Fluids, on dead Animal Flesh : by Mr. Hilde- 

 brandt ..---- 168 



III. Continuation of Mr. Hildebrandt's Paper on the Action of Gasses on dead 

 Animal Flesh - - - - - 178 



IV. On the Nonexistence of Sugar in the Blood of Persons labouring under 

 Diabetes Mellitus. In a Letter to Alexander Marcet, M. D,, F. R. S, from 

 William Hyde Wollaston, M. D., Sec. R. S. - - 18? 



V. Dr. Marcet's Reply to Dr. Wollaston on the same Subject - 190 



VI. On the Algorithm of imaginary Quantities. In a Letter from a Corres-- 

 pendent - - - - - - 193 



VII. Description of a Compensation Pendulum for a Clock : by Mr. Adam 

 Reid, of Green's End, Woolwich - - - 199 



VIII. Method of ascertaining the Hour in the Night, by an Apparatus con- 

 nected with a common Watch : by Mr. G. Spark, of Elgin, Murrayshire, 

 Scotland - -> - - - - 201 



IX. On the Management of the Onion. By Thomas Andrew Knight, Esq. 

 F. R. S. &c. - - - - - 2Q3 



X. Hints relative to the Culture of the early Purple Brocoli, as practised in the 

 Garden of Daniel Beale, Esq. at Edmonton. By Mr. John Maber, F. H. S. 



204- 



XI. Oh some Exotics, which endure the open Air in Devonshire. In a Letter 

 to the Right Hon. Sir Joseph Banks, Bart. K. B. &c. By A. Hawkins, Esq. 



207 



XII. On a new Variety of Pear. By T. A. Knight, Esq. F. R. S. &c. 21Q 



XIII. Meteorological Journal - . - - 214 



XIV. Meteorological Table for the Year 1811, extracted from the Register 

 kept at Kinfauns Castle, the residence of Lord Gray, three miles from Perth, 

 N. Britain, for the Year 1811. Communicated by 'his Lordship 216 



XV. Remarks on some Electrical and Electrochemical Phenomena: by George 

 John Singer, Lecturer on Chemistry and Natural Philosophy - ib. 



XVI. On some new Varieties of the Peach. By T. A. Knight, Esq. F. R. S. &c. 



221 



XVII. On the Aerolites, that fell near Lissa in Bohemia, on the 3d of Septem- 

 ber, 1808: by Mr. Reuss, Counsellor of Mines - - 224 



XVIII. An Answer to the Observations of Dr. Pearson on certain Statements 

 respecting the Alkaline Matter contained in Dropsical Fluids, and in the 

 Serum of the Blood. By Alexander Marcet, M D. F. R. S., one of the 

 Physicians to Guy's Hospital - - - - 230 



XIX. On the supposed Presence of Water in Muriatic Acid Gas. In a Letter 

 from a Correspondent - - - - - 23 S 



Scientific News, - ----- 237 



- APRIL, 



