Produced by Juliet Sutherland and the Online Distributed Proofreading Team at www.pgdp.net [Illustration] SCIENTIFIC AMERICAN SUPPLEMENT NO. 643 NEW YORK, APRIL 28, 1888 Scientific American Supplement. Vol. XXV., No. 643. Scientific American established 1845 Scientific American Supplement, $5 a year. Scientific American and Supplement, $7 a year. * * * * * TABLE OF CONTENTS. I. ARCHAEOLOGY.--The Subterranean Temples of India.--The subterranean temples of India described and illustrated, the wonderful works of the ancient dwellers in Hindostan.--3 illustrations. 10275 II. BIOGRAPHY.--General F. Perrier.--Portrait and biography of the French geodesian, his triangulations in Algiers and Corsica.--1 illustration. 10264 The Crown Prince of Germany--Prince William and his son.-- Biographical note of Prince William, the heir to the German throne.--1 illustration. 10263 III. BIOLOGY.--Poisons.--Abstract of a lecture by Prof. MEYMOTT TIDY, giving the relations of poisons to life. 10273 The President's Annual Address to the Royal Microscopical Society.--The theory of putrefaction and putrefactive organisms.--Exhaustive review of the subject. 10264 IV. CHEMISTRY.--Molecular Weights.--A new and simple method of determining molecular weights for unvolatilizable substances. 10271 V. CIVIL ENGINEERING.--Concrete.--By JOHN LUNDIE.--A practical paper on the above subject.--The uses and proper methods of handling concrete, machine mixing contrasted with hand mixing. 10267 Timber and Some of its Diseases.--By H. MARSHALL WARD.--The continuation of this important treatise on timber destruction, the fungi affecting wood, and treatment of the troubles arising therefrom. 10277 VI. ENGINEERING.--Estrade's High Speed Locomotive.--A comparative review of the engineering features of M. Estrade's new engine, designed for speeds of 77 to 80 miles an hour.--1 illustration. 10266 Machine Designing.--By JOHN B. SWEET.--First portion of a Franklin Institute lecture on this eminently practical subject.--2 illustrations. 10267 VII. METEOROLOGY.--The Peak of Teneriffe.--Electrical and meteorological observations on the summit of Teneriffe. 10265 VIII. MISCELLANEOUS.--Analysis of a Hand Fire Grenade.--By CHAS. CATLETT and R.C. PRICE.--The contents of a fire grenade and its origin. 10271