Such is an outline of the contents of this volume, of which we have felt ourselves obliged to speak in terms unequivocally [p283] favourable; in fact, it contains, strictly speaking, nothing to criticise. It is minute, laborious, and very unpretending, and contains a body of instructions for the performance of experiments, and of descriptions of the modes of managing and applying apparatus, which is not to be had elsewhere, being manifestly derived from diligent research, extensive experience, and correct judgment. It is not a book for amateurs; for they will presently learn from it that there is no royal road to the science of which it treats; but the real student, who will seriously follow its laborious details, will discover in them an acceptable and sure guide through the crooked and intricate, as well as the straight paths of chemistry. Those, however, and those only, who are well versed in the business of the laboratory, both as experimentalists and teachers, can duly appreciate the weighty service which Mr. Faraday has here performed. _Statistical Notices suggested by the actual State of the British Empire, as exhibited in the last Population Census_. Communicated by Mr. Merritt. [Read before the Literary and Philosophical Society of Liverpool.] The population returns of the _decennial lustrum_, or period of ten years, which ended in 1821, were delayed for a considerable time, on account of the difficulties which have always occurred in taking the population of Ireland. They have now, however, been some time completed, and from the _data_ they afford, a few reflections naturally present themselves, which though sufficiently obvious, yet, from the extreme interest of the subject, may be thought deserving of being brought together, and exhibited in a connected form. They point out some peculiarities in the situation of this country, which distinguish it from almost every other nation that has yet existed in ancient or modern times.