The book is the most extensive and complete reference book in the world literature on harmful substances found in industry and agriculture. The first volume is devoted to the consideration of the physical, chemical, toxic properties of hydrocarbons, alcohols, phenols, ethers, oxides, peroxides, aldehydes and ketones and the description of methods for preventing the harmful effects of these substances on the body of people working with them. The second volume is devoted to the consideration of the physical, chemical, toxic properties of organic acids, esters, nitro and amino compounds of the fatty, polymethylene and aromatic series, sero-organic, heterocyclic compounds, organic dyes, polymers and a description of methods for preventing the harmful effects of these substances on the body of people working with them. The third volume is devoted to the consideration of the physical, chemical, toxic properties of inorganic and elementorhainic compounds and the description of methods for preventing their harmful effects on the human body.