a glassy thermoplastic; can be cast and molded or used in coatings and adhesives

valuable source of caviar and isinglass; found in Black and Caspian seas

valuable source of caviar and isinglass; found in Black and Caspian seas

valuable source of caviar and isinglass; found in Black and Caspian seas

valuable source of caviar and isinglass; found in Black and Caspian seas

valuable source of caviar and isinglass; found in Black and Caspian seas

valuable source of caviar and isinglass; found in Black and Caspian seas

valuable source of caviar and isinglass; found in Black and Caspian seas

valuable source of caviar and isinglass; found in Black and Caspian seas

thermometer consisting of a glass capillary tube marked with degrees Celsius or Fahrenheit and containing alcohol which rises or falls as it expands or contracts with changes in temperature