. . "Gum-elastic" . "Gum elastic and its varieties : with a detailed account of its applications and uses and of the discovery of vulcanization"@en . . . "Gum-elastic and its varieties with a detailed account of its applications and uses, and of the discovery of vulcanization"@en . . "V. 2 has title: The applications and uses of vulcanized gum-elastic, with descriptions and directions for manufacturing purposes"@en . "Gum-elastic and its varieties, with a detailed account of its applications and uses, and of the discovery of vulcanization"@en . . . . . . "Gum-elastic and its varieties : with a detailed account of its applications and uses, and of the discovery of vulcanization"@en . "Gum-elastic and its varieties : with a detailed account of its applications and uses, and of the discovery of vulcanization" . . "Gum-elastic and its varieties : with a detailed account of its application and uses, and of the discovery of vulcanization"@en . . . "Gum-elastic and its varieties : with a detailed account of its application and uses, and of the discovery of vulcanization" . . . "Gum-elastic and its varieties : with a detailed account of its applications and uses and of the discovery of vulcanization"@en . . . "v. 2 has title: The applications and uses of vulcanized gum-elastic, with descriptions and directions for manufacturing purposes" . . "Applications and uses of vulcanized gum-elastic"@en . . . . . . . "Gum elastic and its varieties with a detailed account of its applications and uses and of the discovery of vulcanization"@en . .