As no table of the proportional weights of chemical substances entering into combination is to be found in Sir H. Davy’s work, Dr. Young says he took the liberty of inserting one formed from Davy’s numbers and from the experiments of Berzelius and Richter. He thus ended his review, ‘The character of Sir Humphry Davy’s researches has always been that of the most interesting originality, and we have certainly no reason to complain that he has in his experiments very commonly forsaken the beaten path. * * * * * ‘With all its excellences this work must be allowed to bear no inconsiderable marks of haste, and we would easily have conjectured, even if the author had not expressly told us so in his dedication, that the period employed on it “has been the happiest of his life.” In that and in every other happiness which may have befallen him we shall ever most sincerely rejoice; nor shall we think the public will have any reason to reproach him with having done too little for science, even if he should fail at any future time in his avowed resolution of pursuing it “with unabated ardour;” that he has not yet so failed is become from a late accident a matter of public notoriety, and if we may expect perseverance to be at all commensurate to success, we have no reason to be apprehensive of his passing any part of his life in inactivity. ‘The style and manner of this work are nearly the same with those of the author’s lectures delivered in the theatre of the Royal Institution. They have been much admired by some of the most competent judges of good language and good taste, and it has been remarked that Davy was born a poet, and has only become a chemist by accident. Certainly the situation in which he was placed induced him to cultivate an ornamented and popular style of expression and embellishment, and what was encouraged by temporary motives has become natural to him from habit. Hence have arisen a multitude of sentimental reflections and appeals to the feelings, which many will think beauties and some only prettinesses; nor is it necessary for us to decide in which of the two classes of readers we wish ourselves to be arranged, conceiving that in matters so indifferent to the immediate object of the work a great latitude may be allowed to the diversity of taste and opinion.’ On June 18 Davy sent a paper to the Royal Society on ‘Some Combinations of Phosphorus and Sulphur,’ and in July two other papers--‘Further Observations on Chloride of Nitrogen; and on Fluorine and Hydrofluoric Acid.’ Late in August he wrote to a friend, ‘I have just published a volume of the ‘Elements of Chemistry,’ and I hope to publish another in the course of the spring. Having given up lecturing, I shall be able to devote my whole time to the pursuit of discovery.’ On October 14, from Edinburgh, he wrote to Mr. Children: