III. HYGIENE AND MEDICINE.--Lead Poisoning. Clinical lecture by Dr. WM. PEPPER. Effects of a cosmetic of carbonate of lead.--Symptoms of lead poisoning.--Affinity of lead for nerves and muscles.--Treatment of lead poisoning 3745 Recent Investigations of the Blood 3746 The Pulse. Lecture on the pulse in health and disease, by Dr. T. A. McBRIDE 3746 Some Early Symptoms of Insanity 3747 An Improved Method of Applying Antiseptic Vapors 3747 Treatment of Phthisis by Inhalation of Borax and Salicylic Acid 3747 IV. CHEMISTRY AND TECHNOLOGY.--Detection of Starch in Cane Sugar. By P. CASAMAJOR 3747 Double Lever Cement Testing Apparatus. 1 figure 3748 Prediction of Chemical Elements 3748 Oil of Sage 3748 Bronzing Iron 3748 Rust Preventing Compound 3748 Argentine Sheep and Wool 3748 V. NATURAL HISTORY, ETC.--Brain of Limulus Polyphemus. General anatomy of the brain.--Internal structure and histology of the brain.--Comparison of the Limulus brain with the brain of other arthropods 3749 An Unfortunate White Whale. A live whale with a broken neck 3749 Ethereal Oil of California Bay Tree. By J. M. STILLMAN 3749 Forest Trees of North America. Prof. Sargent's catalogue (continued from SUPPLEMENT No. 234). Cedars, Red Woods, Firs, Spruces, etc. 3750 * * * * * THE SUPERIORITY OF AMERICAN WATCHES. The extract from the report of the judges in horology, at the Sydney International Exhibition, with the diagrams showing the comparative merit of the watches tested, given on other pages of the current issue of SCIENTIFIC AMERICAN, cannot fail to interest our readers. There were ten exhibitors, and the inherent and comparative merits of the various exhibits were rated under ten heads on the basis of 100 points "for the highest degree of excellence." There were British, German, French, Swiss, and American competitors; and while the scores of the nine European exhibitors footed up totals ranging from 76 to 686, their average being 389-1/3, the total of the Waltham Watch Company was 981. In detail this remarkable score stood thus: Originality, 98; invention and discovery, 95; utility and quality of material, 95; skill in workmanship, 93; fitness for purpose intended, 100; adaptation to public wants, 100; economy, 100; cost, 100; finish and elegance of cases, 100; timekeeping qualities, 100. Total, 981.