39S New Scientific Books. [Xov. 



annually rather more than eight Winchester bushels of corn. I 

 thought it right to make this error known as soon as possible, to 

 prevent any erroneous inferences from being drawn from the 

 table in question. 



V. Sulp/iate of Sola. 



Want of room obliges me to defer for the present the con- 

 tinuation of the table of the constitution of the salts : but I 

 think it necessary to point out a mistake in that part of the table 

 which was inserted in the last Number of the Annals of Philo- 

 sophy. Sulphate of soda (p. 294) i* said to be composed of 1 

 integrant particle of sulphuric acid -+- 2 integrant particles of 

 soda. From the note it will easily be seen that the reverse is the 

 case. It is composed of 2 s. a. + 1 soda, and its weight, of 

 course, is 107882. Hence the remarks made upon it in page 

 300, as an exception to Berzelius's rule, are erroneous. I have 

 not yet met with any exception .to his rule, except among the 

 nitrates. These exceptions he admits, and endeavours to obviate 

 by the ingenious theory published in this and the preceding 

 Number of the Annals of Philosophy. 



VI. Electrical Oxides. 



The beautiful figures produced on paper by the oxidation of 

 various metals with an electrical battery, cannot be effectually 

 represented by engravings. Mr. Singer proposes to illustrate a 

 few copies of his Elements of Electricity (now in the Press) 

 with some real oxides, produced by his powerful apparatus. 

 Those who desire such copies may secure them by an early 

 transmission of their names to Mr. Singer. 



VII. Practical Chemistry. 

 Dr. Thomson proposes next winter to give a Practical Course 

 of Chemistry to a very limited number of young Gentlemen, 

 who will reside in his house during its continuance. The Course 

 will begin on the 1st of January, 1814. 



Article XV. 



Scientific Books in hand, or in the Press. 



Mr. Kerrison is preparing for the Press An Inquiry into the 

 Establishment and Progress of the Medical Profession in England, 

 as it regards the Physician, Surgeon, Apothecary, General Practi- 

 tioner, and Chemist and Druggist ; with a Compendious Analysis 

 of all the Charters granted to Physicians, Surgeons, and Apotheca- 

 ries, tending to illustrate the Merits of the Bill about to be sub- 

 mitted to Parliament by the Associated Surgeon-Apothecaries of 

 England and Wales. 



Mr. W. Henley is about to publish a Series of Chemical Tables, 

 intended to exhibit the Properties of all the present known Bodies, 

 the Result of their Union, &c. ; forming a Complete Abstract of 

 the Science of ChemLstry. 



