Part II., =Excavations.=--Chapter XX., Hand Excavation or Hand Digging of Oil Wells. Part III., =Methods of Boring.=--Chapters XXI., Methods of Oil-well Drilling or Boring.--XXII., Boring Oil Wells with the Rope.--XXIII., Drilling with Rigid Rods and a Free-fall--Fabian System.--XXIV., Free-fall Drilling by Steam Power.--XXV., Oil-well Drilling by the Canadian System.--XXVI., Drilling Oil Wells on the Combined System.--XXVII., Comparison between the Combined Fauck System and the Canadian.--XXVIII., The American System of Drilling with the Rope.--XXIX., Hydraulic Boring with the Drill by Hand and Steam Power.--XXX., Rotary Drilling of Oil Wells, Bits, Steel-crowned Tools, Diamond Tools--Hand Power and Steam Power--Hydraulic Sand-pumping.--XXXI., Improvements in and different Systems of Drilling Oil Wells. Part IV., =Accidents.=--Chapters XXXII., Boring Accidents--Methods of preventing them--Methods of remedying them.--XXXIII., Explosives and the use of the "Torpedo" Levigation.--XXXIV., Storing and Transport of Petroleum.--XXXV., General Advice--Prospecting, Management and carrying on of Petroleum Boring Operations. Part V., =General Data.=--=Customary Formulae.=--Memento. Practical Part. General Data bearing on Petroleum.--Glossary or Technical Terms used in the Petroleum Industry.--Copious Index. * * * * * =A DICTIONARY OF CHEMICALS AND RAW PRODUCTS USED IN THE MANUFACTURE OF PAINTS, COLOURS, VARNISHES AND ALLIED PREPARATIONS.= By GEORGE H. HURST, F.C.S. Demy 8vo. 380 pp. 1901. Price 7s. 6d.; India and Colonies, 8s.; Other Countries, 8s. 6d.; strictly net. =Contents.= The names of the Chemicals and Raw Products are arranged in alphabetical order, and the description of each varies in length from half to eight pages. The following are some of the articles described and explained: Acetates--Acetic Acid--Acidimetry--Alcohol--Alum--Ammonia--Amber--Animi-- Arsenic--Beeswax--Benzol--Bichromates of Potash and Soda--Bleaching Powder--Bone Black--Boric Acid--Brunswick Green--Cadmium Yellow--Carbonates--Carmine--Carnauba Wax--Caustic Potash and Soda--Chrome Colours--Clay--Coal Tar Colours--Copal--Dammar--Drying Oils--Emerald Green--Gamboge--Glue--Glycerine--Gums--Gypsum--Indian Red--Japanese Lacquer--Lac--Lakes--Lamp Black--Lead Compounds--Linseed Oil--Magnesia--Manganese Compounds--Mica--Nitric Acid--Ochres--Orange Lead--Orr's White--Paraffin--Prussian Blue--Rosin Oil--Sepia--Sienna--Smalts--Sodium Carbonate--Sublimed White Lead--Sulphuric Acid--Terra Verte--Testing Pigments--Turpentine--Ultramarine--Umbers--Vermilionettes--White Lead--Whiting--Zinc Compounds.--Appendix: Comparison of Baume Hydrometer and Specific Gravity for Liquids Lighter than Water--Hydrometer Table for Liquids Heavier than Water--Comparison of Temperature Degrees--Tables for Converting French Metric Weights and Measures into English--Table of the Elements--etc., etc.--Copious Index. =Press Opinions.=